Home / 20,585.27-28,397.25-13,779.56

Finding the Fourth Proportional to 20,585.27, 28,397.25 and 13,779.56

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Solution

The fourth proportional to 20,585.27, 28,397.25 and 13,779.56 is: 19,008.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.27 : 28,397.25 = 13,779.56 : x
  2. Step 2: Convert to fraction form
    20,585.27/28,397.25 = 13,779.56/x
  3. Step 3: Cross multiply
    20,585.27x = 28,397.25 × 13,779.56
  4. Step 4: Simplify right side
    20,585.27x = 391,301,681.20
  5. Step 5: Solve for x
    x = 391,301,681.20/20,585.27
  6. Step 6: Final answer
    x = 19,008.82

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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.