Home / 21,288.25-31,960.64-18,188.17

Finding the Fourth Proportional to 21,288.25, 31,960.64 and 18,188.17

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Solution

The fourth proportional to 21,288.25, 31,960.64 and 18,188.17 is: 27,306.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.25 : 31,960.64 = 18,188.17 : x
  2. Step 2: Convert to fraction form
    21,288.25/31,960.64 = 18,188.17/x
  3. Step 3: Cross multiply
    21,288.25x = 31,960.64 × 18,188.17
  4. Step 4: Simplify right side
    21,288.25x = 581,305,462.69
  5. Step 5: Solve for x
    x = 581,305,462.69/21,288.25
  6. Step 6: Final answer
    x = 27,306.40

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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.