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Finding the Fourth Proportional to 8,480.88, 12,709.80 and 5,397.36

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Solution

The fourth proportional to 8,480.88, 12,709.80 and 5,397.36 is: 8,088.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.88 : 12,709.80 = 5,397.36 : x
  2. Step 2: Convert to fraction form
    8,480.88/12,709.80 = 5,397.36/x
  3. Step 3: Cross multiply
    8,480.88x = 12,709.80 × 5,397.36
  4. Step 4: Simplify right side
    8,480.88x = 68,599,366.13
  5. Step 5: Solve for x
    x = 68,599,366.13/8,480.88
  6. Step 6: Final answer
    x = 8,088.71

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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.