Home / 20,702.72-31,044.56-6,660.15

Finding the Fourth Proportional to 20,702.72, 31,044.56 and 6,660.15

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Solution

The fourth proportional to 20,702.72, 31,044.56 and 6,660.15 is: 9,987.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.72 : 31,044.56 = 6,660.15 : x
  2. Step 2: Convert to fraction form
    20,702.72/31,044.56 = 6,660.15/x
  3. Step 3: Cross multiply
    20,702.72x = 31,044.56 × 6,660.15
  4. Step 4: Simplify right side
    20,702.72x = 206,761,392.98
  5. Step 5: Solve for x
    x = 206,761,392.98/20,702.72
  6. Step 6: Final answer
    x = 9,987.16

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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.