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Finding the Fourth Proportional to 8,612.46, 12,915.45 and 5,103.24

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Solution

The fourth proportional to 8,612.46, 12,915.45 and 5,103.24 is: 7,652.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.46 : 12,915.45 = 5,103.24 : x
  2. Step 2: Convert to fraction form
    8,612.46/12,915.45 = 5,103.24/x
  3. Step 3: Cross multiply
    8,612.46x = 12,915.45 × 5,103.24
  4. Step 4: Simplify right side
    8,612.46x = 65,910,641.06
  5. Step 5: Solve for x
    x = 65,910,641.06/8,612.46
  6. Step 6: Final answer
    x = 7,652.94

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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.