Home / 20,738.97-31,108.47-5,156.59

Finding the Fourth Proportional to 20,738.97, 31,108.47 and 5,156.59

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Solution

The fourth proportional to 20,738.97, 31,108.47 and 5,156.59 is: 7,734.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.97 : 31,108.47 = 5,156.59 : x
  2. Step 2: Convert to fraction form
    20,738.97/31,108.47 = 5,156.59/x
  3. Step 3: Cross multiply
    20,738.97x = 31,108.47 × 5,156.59
  4. Step 4: Simplify right side
    20,738.97x = 160,413,625.32
  5. Step 5: Solve for x
    x = 160,413,625.32/20,738.97
  6. Step 6: Final answer
    x = 7,734.89

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Similar ratio
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1.5x scale

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.