Home / 21,179,380.38-31,769,066.25-12,662,154.78

Finding the Fourth Proportional to 21,179,380.38, 31,769,066.25 and 12,662,154.78

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Solution

The fourth proportional to 21,179,380.38, 31,769,066.25 and 12,662,154.78 is: 18,993,229.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179,380.38 : 31,769,066.25 = 12,662,154.78 : x
  2. Step 2: Convert to fraction form
    21,179,380.38/31,769,066.25 = 12,662,154.78/x
  3. Step 3: Cross multiply
    21,179,380.38x = 31,769,066.25 × 12,662,154.78
  4. Step 4: Simplify right side
    21,179,380.38x = 402,264,834,073,574.12
  5. Step 5: Solve for x
    x = 402,264,834,073,574.12/21,179,380.38
  6. Step 6: Final answer
    x = 18,993,229.59

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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.