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Finding the Fourth Proportional to 31,691.84, 43,731.42 and 18,260.42

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Solution

The fourth proportional to 31,691.84, 43,731.42 and 18,260.42 is: 25,197.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,691.84 : 43,731.42 = 18,260.42 : x
  2. Step 2: Convert to fraction form
    31,691.84/43,731.42 = 18,260.42/x
  3. Step 3: Cross multiply
    31,691.84x = 43,731.42 × 18,260.42
  4. Step 4: Simplify right side
    31,691.84x = 798,554,096.40
  5. Step 5: Solve for x
    x = 798,554,096.40/31,691.84
  6. Step 6: Final answer
    x = 25,197.47

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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.