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Finding the Fourth Proportional to 38,490.70, 57,789.10 and 26,615.30

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Solution

The fourth proportional to 38,490.70, 57,789.10 and 26,615.30 is: 39,959.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,490.70 : 57,789.10 = 26,615.30 : x
  2. Step 2: Convert to fraction form
    38,490.70/57,789.10 = 26,615.30/x
  3. Step 3: Cross multiply
    38,490.70x = 57,789.10 × 26,615.30
  4. Step 4: Simplify right side
    38,490.70x = 1,538,074,233.23
  5. Step 5: Solve for x
    x = 1,538,074,233.23/38,490.70
  6. Step 6: Final answer
    x = 39,959.63

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1.5x scale

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.