Home / 12,121,691.20-18,183,411.60-7,319,039.20

Finding the Fourth Proportional to 12,121,691.20, 18,183,411.60 and 7,319,039.20

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Solution

The fourth proportional to 12,121,691.20, 18,183,411.60 and 7,319,039.20 is: 10,979,087.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121,691.20 : 18,183,411.60 = 7,319,039.20 : x
  2. Step 2: Convert to fraction form
    12,121,691.20/18,183,411.60 = 7,319,039.20/x
  3. Step 3: Cross multiply
    12,121,691.20x = 18,183,411.60 × 7,319,039.20
  4. Step 4: Simplify right side
    12,121,691.20x = 133,085,102,290,134.73
  5. Step 5: Solve for x
    x = 133,085,102,290,134.73/12,121,691.20
  6. Step 6: Final answer
    x = 10,979,087.00

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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.