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Finding the Fourth Proportional to 15,139.92, 20,893.32 and 8,425.92

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Solution

The fourth proportional to 15,139.92, 20,893.32 and 8,425.92 is: 11,627.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.92 : 20,893.32 = 8,425.92 : x
  2. Step 2: Convert to fraction form
    15,139.92/20,893.32 = 8,425.92/x
  3. Step 3: Cross multiply
    15,139.92x = 20,893.32 × 8,425.92
  4. Step 4: Simplify right side
    15,139.92x = 176,045,442.85
  5. Step 5: Solve for x
    x = 176,045,442.85/15,139.92
  6. Step 6: Final answer
    x = 11,627.90

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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.