Home / 10,936.90-15,087.18-8,279.70

Finding the Fourth Proportional to 10,936.90, 15,087.18 and 8,279.70

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Solution

The fourth proportional to 10,936.90, 15,087.18 and 8,279.70 is: 11,421.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,936.90 : 15,087.18 = 8,279.70 : x
  2. Step 2: Convert to fraction form
    10,936.90/15,087.18 = 8,279.70/x
  3. Step 3: Cross multiply
    10,936.90x = 15,087.18 × 8,279.70
  4. Step 4: Simplify right side
    10,936.90x = 124,917,324.25
  5. Step 5: Solve for x
    x = 124,917,324.25/10,936.90
  6. Step 6: Final answer
    x = 11,421.64

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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.