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Finding the Fourth Proportional to 8,979.91, 13,471.88 and 2,740.48

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Solution

The fourth proportional to 8,979.91, 13,471.88 and 2,740.48 is: 4,111.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.91 : 13,471.88 = 2,740.48 : x
  2. Step 2: Convert to fraction form
    8,979.91/13,471.88 = 2,740.48/x
  3. Step 3: Cross multiply
    8,979.91x = 13,471.88 × 2,740.48
  4. Step 4: Simplify right side
    8,979.91x = 36,919,417.70
  5. Step 5: Solve for x
    x = 36,919,417.70/8,979.91
  6. Step 6: Final answer
    x = 4,111.33

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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.