Home / 54,318.20-81,428.70-21,027.20

Finding the Fourth Proportional to 54,318.20, 81,428.70 and 21,027.20

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Solution

The fourth proportional to 54,318.20, 81,428.70 and 21,027.20 is: 31,521.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,318.20 : 81,428.70 = 21,027.20 : x
  2. Step 2: Convert to fraction form
    54,318.20/81,428.70 = 21,027.20/x
  3. Step 3: Cross multiply
    54,318.20x = 81,428.70 × 21,027.20
  4. Step 4: Simplify right side
    54,318.20x = 1,712,217,560.64
  5. Step 5: Solve for x
    x = 1,712,217,560.64/54,318.20
  6. Step 6: Final answer
    x = 31,521.99

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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.