Home / 31,398.59-43,304.98-20,654.49

Finding the Fourth Proportional to 31,398.59, 43,304.98 and 20,654.49

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Solution

The fourth proportional to 31,398.59, 43,304.98 and 20,654.49 is: 28,486.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,398.59 : 43,304.98 = 20,654.49 : x
  2. Step 2: Convert to fraction form
    31,398.59/43,304.98 = 20,654.49/x
  3. Step 3: Cross multiply
    31,398.59x = 43,304.98 × 20,654.49
  4. Step 4: Simplify right side
    31,398.59x = 894,442,425.84
  5. Step 5: Solve for x
    x = 894,442,425.84/31,398.59
  6. Step 6: Final answer
    x = 28,486.71

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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.