Home / 31,989.20-47,979.96-9,817.88

Finding the Fourth Proportional to 31,989.20, 47,979.96 and 9,817.88

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Solution

The fourth proportional to 31,989.20, 47,979.96 and 9,817.88 is: 14,725.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,989.20 : 47,979.96 = 9,817.88 : x
  2. Step 2: Convert to fraction form
    31,989.20/47,979.96 = 9,817.88/x
  3. Step 3: Cross multiply
    31,989.20x = 47,979.96 × 9,817.88
  4. Step 4: Simplify right side
    31,989.20x = 471,061,489.68
  5. Step 5: Solve for x
    x = 471,061,489.68/31,989.20
  6. Step 6: Final answer
    x = 14,725.64

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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.