Home / 20,717.19-28,589.67-11,285.73

Finding the Fourth Proportional to 20,717.19, 28,589.67 and 11,285.73

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Solution

The fourth proportional to 20,717.19, 28,589.67 and 11,285.73 is: 15,574.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.19 : 28,589.67 = 11,285.73 : x
  2. Step 2: Convert to fraction form
    20,717.19/28,589.67 = 11,285.73/x
  3. Step 3: Cross multiply
    20,717.19x = 28,589.67 × 11,285.73
  4. Step 4: Simplify right side
    20,717.19x = 322,655,296.41
  5. Step 5: Solve for x
    x = 322,655,296.41/20,717.19
  6. Step 6: Final answer
    x = 15,574.28

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Half scale
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Double scale
Find fourth proportional to 20,718.19, 28,591.05 and 11,286.73
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.