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Finding the Fourth Proportional to 19,668,531.20, 29,502,796.80 and 18,156,876.80

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Solution

The fourth proportional to 19,668,531.20, 29,502,796.80 and 18,156,876.80 is: 27,235,315.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,668,531.20 : 29,502,796.80 = 18,156,876.80 : x
  2. Step 2: Convert to fraction form
    19,668,531.20/29,502,796.80 = 18,156,876.80/x
  3. Step 3: Cross multiply
    19,668,531.20x = 29,502,796.80 × 18,156,876.80
  4. Step 4: Simplify right side
    19,668,531.20x = 535,678,646,753,034.25
  5. Step 5: Solve for x
    x = 535,678,646,753,034.25/19,668,531.20
  6. Step 6: Final answer
    x = 27,235,315.20

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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.