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Finding the Fourth Proportional to 38,158.88, 52,659.25 and 21,391.88

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Solution

The fourth proportional to 38,158.88, 52,659.25 and 21,391.88 is: 29,520.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,158.88 : 52,659.25 = 21,391.88 : x
  2. Step 2: Convert to fraction form
    38,158.88/52,659.25 = 21,391.88/x
  3. Step 3: Cross multiply
    38,158.88x = 52,659.25 × 21,391.88
  4. Step 4: Simplify right side
    38,158.88x = 1,126,480,040.11
  5. Step 5: Solve for x
    x = 1,126,480,040.11/38,158.88
  6. Step 6: Final answer
    x = 29,520.79

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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.