Home / 54,431.80-81,632.28-21,144.76

Finding the Fourth Proportional to 54,431.80, 81,632.28 and 21,144.76

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Solution

The fourth proportional to 54,431.80, 81,632.28 and 21,144.76 is: 31,711.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,431.80 : 81,632.28 = 21,144.76 : x
  2. Step 2: Convert to fraction form
    54,431.80/81,632.28 = 21,144.76/x
  3. Step 3: Cross multiply
    54,431.80x = 81,632.28 × 21,144.76
  4. Step 4: Simplify right side
    54,431.80x = 1,726,094,968.85
  5. Step 5: Solve for x
    x = 1,726,094,968.85/54,431.80
  6. Step 6: Final answer
    x = 31,711.15

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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.