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Finding the Fourth Proportional to 19,641.92, 29,404.32 and 18,942.08

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Solution

The fourth proportional to 19,641.92, 29,404.32 and 18,942.08 is: 28,356.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,641.92 : 29,404.32 = 18,942.08 : x
  2. Step 2: Convert to fraction form
    19,641.92/29,404.32 = 18,942.08/x
  3. Step 3: Cross multiply
    19,641.92x = 29,404.32 × 18,942.08
  4. Step 4: Simplify right side
    19,641.92x = 556,978,981.79
  5. Step 5: Solve for x
    x = 556,978,981.79/19,641.92
  6. Step 6: Final answer
    x = 28,356.65

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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.