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Finding the Fourth Proportional to 21,854,491.20, 32,781,736.80 and 20,361,499.20

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Solution

The fourth proportional to 21,854,491.20, 32,781,736.80 and 20,361,499.20 is: 30,542,248.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,854,491.20 : 32,781,736.80 = 20,361,499.20 : x
  2. Step 2: Convert to fraction form
    21,854,491.20/32,781,736.80 = 20,361,499.20/x
  3. Step 3: Cross multiply
    21,854,491.20x = 32,781,736.80 × 20,361,499.20
  4. Step 4: Simplify right side
    21,854,491.20x = 667,485,307,627,810.50
  5. Step 5: Solve for x
    x = 667,485,307,627,810.50/21,854,491.20
  6. Step 6: Final answer
    x = 30,542,248.80

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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.