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Finding the Fourth Proportional to 21,981,710.80, 32,957,206.20 and 13,001,640.40

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Solution

The fourth proportional to 21,981,710.80, 32,957,206.20 and 13,001,640.40 is: 19,493,375.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981,710.80 : 32,957,206.20 = 13,001,640.40 : x
  2. Step 2: Convert to fraction form
    21,981,710.80/32,957,206.20 = 13,001,640.40/x
  3. Step 3: Cross multiply
    21,981,710.80x = 32,957,206.20 × 13,001,640.40
  4. Step 4: Simplify right side
    21,981,710.80x = 428,497,743,601,050.50
  5. Step 5: Solve for x
    x = 428,497,743,601,050.50/21,981,710.80
  6. Step 6: Final answer
    x = 19,493,375.54

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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.