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Finding the Fourth Proportional to 7,909.38, 10,915.02 and 4,372.65

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Solution

The fourth proportional to 7,909.38, 10,915.02 and 4,372.65 is: 6,034.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.38 : 10,915.02 = 4,372.65 : x
  2. Step 2: Convert to fraction form
    7,909.38/10,915.02 = 4,372.65/x
  3. Step 3: Cross multiply
    7,909.38x = 10,915.02 × 4,372.65
  4. Step 4: Simplify right side
    7,909.38x = 47,727,562.20
  5. Step 5: Solve for x
    x = 47,727,562.20/7,909.38
  6. Step 6: Final answer
    x = 6,034.30

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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.