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Finding the Fourth Proportional to 12,239,376.80, 18,359,065.20 and 10,916,679.20

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Solution

The fourth proportional to 12,239,376.80, 18,359,065.20 and 10,916,679.20 is: 16,375,018.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239,376.80 : 18,359,065.20 = 10,916,679.20 : x
  2. Step 2: Convert to fraction form
    12,239,376.80/18,359,065.20 = 10,916,679.20/x
  3. Step 3: Cross multiply
    12,239,376.80x = 18,359,065.20 × 10,916,679.20
  4. Step 4: Simplify right side
    12,239,376.80x = 200,420,025,200,283.81
  5. Step 5: Solve for x
    x = 200,420,025,200,283.81/12,239,376.80
  6. Step 6: Final answer
    x = 16,375,018.80

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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.