Home / 20,876.76-31,319.69-6,086.97

Finding the Fourth Proportional to 20,876.76, 31,319.69 and 6,086.97

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Solution

The fourth proportional to 20,876.76, 31,319.69 and 6,086.97 is: 9,131.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.76 : 31,319.69 = 6,086.97 : x
  2. Step 2: Convert to fraction form
    20,876.76/31,319.69 = 6,086.97/x
  3. Step 3: Cross multiply
    20,876.76x = 31,319.69 × 6,086.97
  4. Step 4: Simplify right side
    20,876.76x = 190,641,983.00
  5. Step 5: Solve for x
    x = 190,641,983.00/20,876.76
  6. Step 6: Final answer
    x = 9,131.78

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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.