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Finding the Fourth Proportional to 8,115.66, 12,149.75 and 7,337.45

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Solution

The fourth proportional to 8,115.66, 12,149.75 and 7,337.45 is: 10,984.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.66 : 12,149.75 = 7,337.45 : x
  2. Step 2: Convert to fraction form
    8,115.66/12,149.75 = 7,337.45/x
  3. Step 3: Cross multiply
    8,115.66x = 12,149.75 × 7,337.45
  4. Step 4: Simplify right side
    8,115.66x = 89,148,085.70
  5. Step 5: Solve for x
    x = 89,148,085.70/8,115.66
  6. Step 6: Final answer
    x = 10,984.70

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1.5x scale

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.