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Finding the Fourth Proportional to 8,979.34, 12,391.48 and 5,001.22

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Solution

The fourth proportional to 8,979.34, 12,391.48 and 5,001.22 is: 6,901.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.34 : 12,391.48 = 5,001.22 : x
  2. Step 2: Convert to fraction form
    8,979.34/12,391.48 = 5,001.22/x
  3. Step 3: Cross multiply
    8,979.34x = 12,391.48 × 5,001.22
  4. Step 4: Simplify right side
    8,979.34x = 61,972,517.61
  5. Step 5: Solve for x
    x = 61,972,517.61/8,979.34
  6. Step 6: Final answer
    x = 6,901.68

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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.