Home / 54,254.16-81,372.80-20,989.60

Finding the Fourth Proportional to 54,254.16, 81,372.80 and 20,989.60

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Solution

The fourth proportional to 54,254.16, 81,372.80 and 20,989.60 is: 31,481.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,254.16 : 81,372.80 = 20,989.60 : x
  2. Step 2: Convert to fraction form
    54,254.16/81,372.80 = 20,989.60/x
  3. Step 3: Cross multiply
    54,254.16x = 81,372.80 × 20,989.60
  4. Step 4: Simplify right side
    54,254.16x = 1,707,982,522.88
  5. Step 5: Solve for x
    x = 1,707,982,522.88/54,254.16
  6. Step 6: Final answer
    x = 31,481.13

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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.