Home / 20,862.06-31,293.12-5,279.70

Finding the Fourth Proportional to 20,862.06, 31,293.12 and 5,279.70

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Solution

The fourth proportional to 20,862.06, 31,293.12 and 5,279.70 is: 7,919.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.06 : 31,293.12 = 5,279.70 : x
  2. Step 2: Convert to fraction form
    20,862.06/31,293.12 = 5,279.70/x
  3. Step 3: Cross multiply
    20,862.06x = 31,293.12 × 5,279.70
  4. Step 4: Simplify right side
    20,862.06x = 165,218,285.66
  5. Step 5: Solve for x
    x = 165,218,285.66/20,862.06
  6. Step 6: Final answer
    x = 7,919.56

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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.