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Finding the Fourth Proportional to 8,432.50, 12,629.07 and 6,665.64

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Solution

The fourth proportional to 8,432.50, 12,629.07 and 6,665.64 is: 9,982.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,432.50 : 12,629.07 = 6,665.64 : x
  2. Step 2: Convert to fraction form
    8,432.50/12,629.07 = 6,665.64/x
  3. Step 3: Cross multiply
    8,432.50x = 12,629.07 × 6,665.64
  4. Step 4: Simplify right side
    8,432.50x = 84,180,862.52
  5. Step 5: Solve for x
    x = 84,180,862.52/8,432.50
  6. Step 6: Final answer
    x = 9,982.91

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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.