Home / 20,910.12-31,382.46-8,606.76

Finding the Fourth Proportional to 20,910.12, 31,382.46 and 8,606.76

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Solution

The fourth proportional to 20,910.12, 31,382.46 and 8,606.76 is: 12,917.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.12 : 31,382.46 = 8,606.76 : x
  2. Step 2: Convert to fraction form
    20,910.12/31,382.46 = 8,606.76/x
  3. Step 3: Cross multiply
    20,910.12x = 31,382.46 × 8,606.76
  4. Step 4: Simplify right side
    20,910.12x = 270,101,301.43
  5. Step 5: Solve for x
    x = 270,101,301.43/20,910.12
  6. Step 6: Final answer
    x = 12,917.25

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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.