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Finding the Fourth Proportional to 12,482,812.80, 18,724,219.20 and 11,039,587.20

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Solution

The fourth proportional to 12,482,812.80, 18,724,219.20 and 11,039,587.20 is: 16,559,380.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,482,812.80 : 18,724,219.20 = 11,039,587.20 : x
  2. Step 2: Convert to fraction form
    12,482,812.80/18,724,219.20 = 11,039,587.20/x
  3. Step 3: Cross multiply
    12,482,812.80x = 18,724,219.20 × 11,039,587.20
  4. Step 4: Simplify right side
    12,482,812.80x = 206,707,650,610,314.22
  5. Step 5: Solve for x
    x = 206,707,650,610,314.22/12,482,812.80
  6. Step 6: Final answer
    x = 16,559,380.80

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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.