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Finding the Fourth Proportional to 10,616.60, 15,931.05 and 4,375.45

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Solution

The fourth proportional to 10,616.60, 15,931.05 and 4,375.45 is: 6,565.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,616.60 : 15,931.05 = 4,375.45 : x
  2. Step 2: Convert to fraction form
    10,616.60/15,931.05 = 4,375.45/x
  3. Step 3: Cross multiply
    10,616.60x = 15,931.05 × 4,375.45
  4. Step 4: Simplify right side
    10,616.60x = 69,705,516.23
  5. Step 5: Solve for x
    x = 69,705,516.23/10,616.60
  6. Step 6: Final answer
    x = 6,565.71

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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.