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Finding the Fourth Proportional to 18,191,719.20, 27,287,578.80 and 8,625,781.20

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Solution

The fourth proportional to 18,191,719.20, 27,287,578.80 and 8,625,781.20 is: 12,938,671.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,191,719.20 : 27,287,578.80 = 8,625,781.20 : x
  2. Step 2: Convert to fraction form
    18,191,719.20/27,287,578.80 = 8,625,781.20/x
  3. Step 3: Cross multiply
    18,191,719.20x = 27,287,578.80 × 8,625,781.20
  4. Step 4: Simplify right side
    18,191,719.20x = 235,376,684,206,558.53
  5. Step 5: Solve for x
    x = 235,376,684,206,558.53/18,191,719.20
  6. Step 6: Final answer
    x = 12,938,671.80

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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.