Home / 54,657.11-81,967.31-20,915.25

Finding the Fourth Proportional to 54,657.11, 81,967.31 and 20,915.25

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Solution

The fourth proportional to 54,657.11, 81,967.31 and 20,915.25 is: 31,365.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,657.11 : 81,967.31 = 20,915.25 : x
  2. Step 2: Convert to fraction form
    54,657.11/81,967.31 = 20,915.25/x
  3. Step 3: Cross multiply
    54,657.11x = 81,967.31 × 20,915.25
  4. Step 4: Simplify right side
    54,657.11x = 1,714,366,675.90
  5. Step 5: Solve for x
    x = 1,714,366,675.90/54,657.11
  6. Step 6: Final answer
    x = 31,365.85

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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.