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Finding the Fourth Proportional to 38,480.70, 57,721.05 and 31,914.30

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Solution

The fourth proportional to 38,480.70, 57,721.05 and 31,914.30 is: 47,871.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,480.70 : 57,721.05 = 31,914.30 : x
  2. Step 2: Convert to fraction form
    38,480.70/57,721.05 = 31,914.30/x
  3. Step 3: Cross multiply
    38,480.70x = 57,721.05 × 31,914.30
  4. Step 4: Simplify right side
    38,480.70x = 1,842,126,906.02
  5. Step 5: Solve for x
    x = 1,842,126,906.02/38,480.70
  6. Step 6: Final answer
    x = 47,871.45

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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.