Home / 20,538.02-30,810.20-8,691.86

Finding the Fourth Proportional to 20,538.02, 30,810.20 and 8,691.86

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Solution

The fourth proportional to 20,538.02, 30,810.20 and 8,691.86 is: 13,039.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.02 : 30,810.20 = 8,691.86 : x
  2. Step 2: Convert to fraction form
    20,538.02/30,810.20 = 8,691.86/x
  3. Step 3: Cross multiply
    20,538.02x = 30,810.20 × 8,691.86
  4. Step 4: Simplify right side
    20,538.02x = 267,797,747.46
  5. Step 5: Solve for x
    x = 267,797,747.46/20,538.02
  6. Step 6: Final answer
    x = 13,039.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.