Home / 54,589.14-81,881.16-21,315.30

Finding the Fourth Proportional to 54,589.14, 81,881.16 and 21,315.30

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Solution

The fourth proportional to 54,589.14, 81,881.16 and 21,315.30 is: 31,971.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,589.14 : 81,881.16 = 21,315.30 : x
  2. Step 2: Convert to fraction form
    54,589.14/81,881.16 = 21,315.30/x
  3. Step 3: Cross multiply
    54,589.14x = 81,881.16 × 21,315.30
  4. Step 4: Simplify right side
    54,589.14x = 1,745,321,489.75
  5. Step 5: Solve for x
    x = 1,745,321,489.75/54,589.14
  6. Step 6: Final answer
    x = 31,971.95

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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.