Home / 8,511.29-11,742.35-5,279.61

Finding the Fourth Proportional to 8,511.29, 11,742.35 and 5,279.61

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Solution

The fourth proportional to 8,511.29, 11,742.35 and 5,279.61 is: 7,283.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,511.29 : 11,742.35 = 5,279.61 : x
  2. Step 2: Convert to fraction form
    8,511.29/11,742.35 = 5,279.61/x
  3. Step 3: Cross multiply
    8,511.29x = 11,742.35 × 5,279.61
  4. Step 4: Simplify right side
    8,511.29x = 61,995,098.09
  5. Step 5: Solve for x
    x = 61,995,098.09/8,511.29
  6. Step 6: Final answer
    x = 7,283.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.