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Finding the Fourth Proportional to 8,447.70, 12,671.55 and 8,399.10

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Solution

The fourth proportional to 8,447.70, 12,671.55 and 8,399.10 is: 12,598.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,447.70 : 12,671.55 = 8,399.10 : x
  2. Step 2: Convert to fraction form
    8,447.70/12,671.55 = 8,399.10/x
  3. Step 3: Cross multiply
    8,447.70x = 12,671.55 × 8,399.10
  4. Step 4: Simplify right side
    8,447.70x = 106,429,615.61
  5. Step 5: Solve for x
    x = 106,429,615.61/8,447.70
  6. Step 6: Final answer
    x = 12,598.65

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Similar ratio
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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.