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Finding the Fourth Proportional to 15,147.30, 20,903 and 8,432.76

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Solution

The fourth proportional to 15,147.30, 20,903 and 8,432.76 is: 11,637.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,147.30 : 20,903 = 8,432.76 : x
  2. Step 2: Convert to fraction form
    15,147.30/20,903 = 8,432.76/x
  3. Step 3: Cross multiply
    15,147.30x = 20,903 × 8,432.76
  4. Step 4: Simplify right side
    15,147.30x = 176,269,982.28
  5. Step 5: Solve for x
    x = 176,269,982.28/15,147.30
  6. Step 6: Final answer
    x = 11,637.06

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Double scale
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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.