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Finding the Fourth Proportional to 18,707,752.80, 28,061,629.20 and 12,543,037.20

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Solution

The fourth proportional to 18,707,752.80, 28,061,629.20 and 12,543,037.20 is: 18,814,555.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707,752.80 : 28,061,629.20 = 12,543,037.20 : x
  2. Step 2: Convert to fraction form
    18,707,752.80/28,061,629.20 = 12,543,037.20/x
  3. Step 3: Cross multiply
    18,707,752.80x = 28,061,629.20 × 12,543,037.20
  4. Step 4: Simplify right side
    18,707,752.80x = 351,978,058,948,206.19
  5. Step 5: Solve for x
    x = 351,978,058,948,206.19/18,707,752.80
  6. Step 6: Final answer
    x = 18,814,555.80

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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.