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Finding the Fourth Proportional to 19,932,751.20, 27,981,434.40 and 19,932,751.20

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Solution

The fourth proportional to 19,932,751.20, 27,981,434.40 and 19,932,751.20 is: 27,981,434.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,932,751.20 : 27,981,434.40 = 19,932,751.20 : x
  2. Step 2: Convert to fraction form
    19,932,751.20/27,981,434.40 = 19,932,751.20/x
  3. Step 3: Cross multiply
    19,932,751.20x = 27,981,434.40 × 19,932,751.20
  4. Step 4: Simplify right side
    19,932,751.20x = 557,746,970,114,321.25
  5. Step 5: Solve for x
    x = 557,746,970,114,321.25/19,932,751.20
  6. Step 6: Final answer
    x = 27,981,434.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.