Home / 21,004,340.20-28,991,382.66-13,680,423.88

Finding the Fourth Proportional to 21,004,340.20, 28,991,382.66 and 13,680,423.88

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Solution

The fourth proportional to 21,004,340.20, 28,991,382.66 and 13,680,423.88 is: 18,882,497.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004,340.20 : 28,991,382.66 = 13,680,423.88 : x
  2. Step 2: Convert to fraction form
    21,004,340.20/28,991,382.66 = 13,680,423.88/x
  3. Step 3: Cross multiply
    21,004,340.20x = 28,991,382.66 × 13,680,423.88
  4. Step 4: Simplify right side
    21,004,340.20x = 396,614,403,656,081.94
  5. Step 5: Solve for x
    x = 396,614,403,656,081.94/21,004,340.20
  6. Step 6: Final answer
    x = 18,882,497.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.