Home / 10,081.10-15,121.65-8,137.10

Finding the Fourth Proportional to 10,081.10, 15,121.65 and 8,137.10

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Solution

The fourth proportional to 10,081.10, 15,121.65 and 8,137.10 is: 12,205.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,081.10 : 15,121.65 = 8,137.10 : x
  2. Step 2: Convert to fraction form
    10,081.10/15,121.65 = 8,137.10/x
  3. Step 3: Cross multiply
    10,081.10x = 15,121.65 × 8,137.10
  4. Step 4: Simplify right side
    10,081.10x = 123,046,378.22
  5. Step 5: Solve for x
    x = 123,046,378.22/10,081.10
  6. Step 6: Final answer
    x = 12,205.65

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Half scale
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Similar ratio
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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.