Home / 54,454.80-81,643.76-21,147.12

Finding the Fourth Proportional to 54,454.80, 81,643.76 and 21,147.12

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Solution

The fourth proportional to 54,454.80, 81,643.76 and 21,147.12 is: 31,705.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,454.80 : 81,643.76 = 21,147.12 : x
  2. Step 2: Convert to fraction form
    54,454.80/81,643.76 = 21,147.12/x
  3. Step 3: Cross multiply
    54,454.80x = 81,643.76 × 21,147.12
  4. Step 4: Simplify right side
    54,454.80x = 1,726,530,389.97
  5. Step 5: Solve for x
    x = 1,726,530,389.97/54,454.80
  6. Step 6: Final answer
    x = 31,705.75

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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.