Home / 20,291.81-28,002.83-11,339.69

Finding the Fourth Proportional to 20,291.81, 28,002.83 and 11,339.69

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Solution

The fourth proportional to 20,291.81, 28,002.83 and 11,339.69 is: 15,648.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.81 : 28,002.83 = 11,339.69 : x
  2. Step 2: Convert to fraction form
    20,291.81/28,002.83 = 11,339.69/x
  3. Step 3: Cross multiply
    20,291.81x = 28,002.83 × 11,339.69
  4. Step 4: Simplify right side
    20,291.81x = 317,543,411.32
  5. Step 5: Solve for x
    x = 317,543,411.32/20,291.81
  6. Step 6: Final answer
    x = 15,648.85

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Find fourth proportional to 10,145.91, 14,001.42 and 5,669.85
Half scale
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Double scale
Find fourth proportional to 20,292.81, 28,004.21 and 11,340.69
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.