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Finding the Fourth Proportional to 8,472.61, 12,710.60 and 2,629

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Solution

The fourth proportional to 8,472.61, 12,710.60 and 2,629 is: 3,944.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,472.61 : 12,710.60 = 2,629 : x
  2. Step 2: Convert to fraction form
    8,472.61/12,710.60 = 2,629/x
  3. Step 3: Cross multiply
    8,472.61x = 12,710.60 × 2,629
  4. Step 4: Simplify right side
    8,472.61x = 33,416,167.40
  5. Step 5: Solve for x
    x = 33,416,167.40/8,472.61
  6. Step 6: Final answer
    x = 3,944.02

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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.