Home / 54,421.57-81,616.89-21,134.53

Finding the Fourth Proportional to 54,421.57, 81,616.89 and 21,134.53

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Solution

The fourth proportional to 54,421.57, 81,616.89 and 21,134.53 is: 31,695.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,421.57 : 81,616.89 = 21,134.53 : x
  2. Step 2: Convert to fraction form
    54,421.57/81,616.89 = 21,134.53/x
  3. Step 3: Cross multiply
    54,421.57x = 81,616.89 × 21,134.53
  4. Step 4: Simplify right side
    54,421.57x = 1,724,934,202.13
  5. Step 5: Solve for x
    x = 1,724,934,202.13/54,421.57
  6. Step 6: Final answer
    x = 31,695.78

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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.