Home / 18,721,872.20-28,082,808.30-10,631,721.80

Finding the Fourth Proportional to 18,721,872.20, 28,082,808.30 and 10,631,721.80

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Solution

The fourth proportional to 18,721,872.20, 28,082,808.30 and 10,631,721.80 is: 15,947,582.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721,872.20 : 28,082,808.30 = 10,631,721.80 : x
  2. Step 2: Convert to fraction form
    18,721,872.20/28,082,808.30 = 10,631,721.80/x
  3. Step 3: Cross multiply
    18,721,872.20x = 28,082,808.30 × 10,631,721.80
  4. Step 4: Simplify right side
    18,721,872.20x = 298,568,605,208,331
  5. Step 5: Solve for x
    x = 298,568,605,208,331/18,721,872.20
  6. Step 6: Final answer
    x = 15,947,582.70

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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.