Home / 20,704.82-28,565.38-13,538.93

Finding the Fourth Proportional to 20,704.82, 28,565.38 and 13,538.93

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Solution

The fourth proportional to 20,704.82, 28,565.38 and 13,538.93 is: 18,678.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.82 : 28,565.38 = 13,538.93 : x
  2. Step 2: Convert to fraction form
    20,704.82/28,565.38 = 13,538.93/x
  3. Step 3: Cross multiply
    20,704.82x = 28,565.38 × 13,538.93
  4. Step 4: Simplify right side
    20,704.82x = 386,744,638.86
  5. Step 5: Solve for x
    x = 386,744,638.86/20,704.82
  6. Step 6: Final answer
    x = 18,678.97

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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.