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Finding the Fourth Proportional to 19,642.92, 29,405.82 and 18,943.08

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Solution

The fourth proportional to 19,642.92, 29,405.82 and 18,943.08 is: 28,358.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,642.92 : 29,405.82 = 18,943.08 : x
  2. Step 2: Convert to fraction form
    19,642.92/29,405.82 = 18,943.08/x
  3. Step 3: Cross multiply
    19,642.92x = 29,405.82 × 18,943.08
  4. Step 4: Simplify right side
    19,642.92x = 557,036,800.73
  5. Step 5: Solve for x
    x = 557,036,800.73/19,642.92
  6. Step 6: Final answer
    x = 28,358.15

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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.