Home / 20,720.08-28,593.30-11,288.71

Finding the Fourth Proportional to 20,720.08, 28,593.30 and 11,288.71

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Solution

The fourth proportional to 20,720.08, 28,593.30 and 11,288.71 is: 15,578.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.08 : 28,593.30 = 11,288.71 : x
  2. Step 2: Convert to fraction form
    20,720.08/28,593.30 = 11,288.71/x
  3. Step 3: Cross multiply
    20,720.08x = 28,593.30 × 11,288.71
  4. Step 4: Simplify right side
    20,720.08x = 322,781,471.64
  5. Step 5: Solve for x
    x = 322,781,471.64/20,720.08
  6. Step 6: Final answer
    x = 15,578.20

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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.