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Finding the Fourth Proportional to 8,713.69, 12,025.05 and 5,129.44

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Solution

The fourth proportional to 8,713.69, 12,025.05 and 5,129.44 is: 7,078.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,713.69 : 12,025.05 = 5,129.44 : x
  2. Step 2: Convert to fraction form
    8,713.69/12,025.05 = 5,129.44/x
  3. Step 3: Cross multiply
    8,713.69x = 12,025.05 × 5,129.44
  4. Step 4: Simplify right side
    8,713.69x = 61,681,772.47
  5. Step 5: Solve for x
    x = 61,681,772.47/8,713.69
  6. Step 6: Final answer
    x = 7,078.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.