Home / 8,081.64-12,121.92-2,887.65

Finding the Fourth Proportional to 8,081.64, 12,121.92 and 2,887.65

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Solution

The fourth proportional to 8,081.64, 12,121.92 and 2,887.65 is: 4,331.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.64 : 12,121.92 = 2,887.65 : x
  2. Step 2: Convert to fraction form
    8,081.64/12,121.92 = 2,887.65/x
  3. Step 3: Cross multiply
    8,081.64x = 12,121.92 × 2,887.65
  4. Step 4: Simplify right side
    8,081.64x = 35,003,862.29
  5. Step 5: Solve for x
    x = 35,003,862.29/8,081.64
  6. Step 6: Final answer
    x = 4,331.28

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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.