Home / 20,700.18-28,561.90-13,540.58

Finding the Fourth Proportional to 20,700.18, 28,561.90 and 13,540.58

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Solution

The fourth proportional to 20,700.18, 28,561.90 and 13,540.58 is: 18,683.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.18 : 28,561.90 = 13,540.58 : x
  2. Step 2: Convert to fraction form
    20,700.18/28,561.90 = 13,540.58/x
  3. Step 3: Cross multiply
    20,700.18x = 28,561.90 × 13,540.58
  4. Step 4: Simplify right side
    20,700.18x = 386,744,691.90
  5. Step 5: Solve for x
    x = 386,744,691.90/20,700.18
  6. Step 6: Final answer
    x = 18,683.16

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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.