Home / 20,291.28-28,002.11-11,339.16

Finding the Fourth Proportional to 20,291.28, 28,002.11 and 11,339.16

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Solution

The fourth proportional to 20,291.28, 28,002.11 and 11,339.16 is: 15,648.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.28 : 28,002.11 = 11,339.16 : x
  2. Step 2: Convert to fraction form
    20,291.28/28,002.11 = 11,339.16/x
  3. Step 3: Cross multiply
    20,291.28x = 28,002.11 × 11,339.16
  4. Step 4: Simplify right side
    20,291.28x = 317,520,405.63
  5. Step 5: Solve for x
    x = 317,520,405.63/20,291.28
  6. Step 6: Final answer
    x = 15,648.12

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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.