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Finding the Fourth Proportional to 29,572.16, 40,820.66 and 18,392

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Solution

The fourth proportional to 29,572.16, 40,820.66 and 18,392 is: 25,387.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,572.16 : 40,820.66 = 18,392 : x
  2. Step 2: Convert to fraction form
    29,572.16/40,820.66 = 18,392/x
  3. Step 3: Cross multiply
    29,572.16x = 40,820.66 × 18,392
  4. Step 4: Simplify right side
    29,572.16x = 750,773,578.72
  5. Step 5: Solve for x
    x = 750,773,578.72/29,572.16
  6. Step 6: Final answer
    x = 25,387.85

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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.