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Finding the Fourth Proportional to 8,397.62, 11,582.79 and 7,129.95

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Solution

The fourth proportional to 8,397.62, 11,582.79 and 7,129.95 is: 9,834.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,397.62 : 11,582.79 = 7,129.95 : x
  2. Step 2: Convert to fraction form
    8,397.62/11,582.79 = 7,129.95/x
  3. Step 3: Cross multiply
    8,397.62x = 11,582.79 × 7,129.95
  4. Step 4: Simplify right side
    8,397.62x = 82,584,713.56
  5. Step 5: Solve for x
    x = 82,584,713.56/8,397.62
  6. Step 6: Final answer
    x = 9,834.31

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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.