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Finding the Fourth Proportional to 29,215.88, 40,322.96 and 28,243.88

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Solution

The fourth proportional to 29,215.88, 40,322.96 and 28,243.88 is: 38,981.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,215.88 : 40,322.96 = 28,243.88 : x
  2. Step 2: Convert to fraction form
    29,215.88/40,322.96 = 28,243.88/x
  3. Step 3: Cross multiply
    29,215.88x = 40,322.96 × 28,243.88
  4. Step 4: Simplify right side
    29,215.88x = 1,138,876,843.48
  5. Step 5: Solve for x
    x = 1,138,876,843.48/29,215.88
  6. Step 6: Final answer
    x = 38,981.43

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Double scale
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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.