Home / 21,166.56-31,687.38-15,644.61

Finding the Fourth Proportional to 21,166.56, 31,687.38 and 15,644.61

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Solution

The fourth proportional to 21,166.56, 31,687.38 and 15,644.61 is: 23,420.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.56 : 31,687.38 = 15,644.61 : x
  2. Step 2: Convert to fraction form
    21,166.56/31,687.38 = 15,644.61/x
  3. Step 3: Cross multiply
    21,166.56x = 31,687.38 × 15,644.61
  4. Step 4: Simplify right side
    21,166.56x = 495,736,702.02
  5. Step 5: Solve for x
    x = 495,736,702.02/21,166.56
  6. Step 6: Final answer
    x = 23,420.75

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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.