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Finding the Fourth Proportional to 7,909.90, 10,915.22 and 4,372.88

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Solution

The fourth proportional to 7,909.90, 10,915.22 and 4,372.88 is: 6,034.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.90 : 10,915.22 = 4,372.88 : x
  2. Step 2: Convert to fraction form
    7,909.90/10,915.22 = 4,372.88/x
  3. Step 3: Cross multiply
    7,909.90x = 10,915.22 × 4,372.88
  4. Step 4: Simplify right side
    7,909.90x = 47,730,903.59
  5. Step 5: Solve for x
    x = 47,730,903.59/7,909.90
  6. Step 6: Final answer
    x = 6,034.33

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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.