Home / 20,892.38-28,829.14-12,391.44

Finding the Fourth Proportional to 20,892.38, 28,829.14 and 12,391.44

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Solution

The fourth proportional to 20,892.38, 28,829.14 and 12,391.44 is: 17,098.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.38 : 28,829.14 = 12,391.44 : x
  2. Step 2: Convert to fraction form
    20,892.38/28,829.14 = 12,391.44/x
  3. Step 3: Cross multiply
    20,892.38x = 28,829.14 × 12,391.44
  4. Step 4: Simplify right side
    20,892.38x = 357,234,558.56
  5. Step 5: Solve for x
    x = 357,234,558.56/20,892.38
  6. Step 6: Final answer
    x = 17,098.80

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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.