Home / 12,500.76-17,247.12-7,122.78

Finding the Fourth Proportional to 12,500.76, 17,247.12 and 7,122.78

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Solution

The fourth proportional to 12,500.76, 17,247.12 and 7,122.78 is: 9,827.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,500.76 : 17,247.12 = 7,122.78 : x
  2. Step 2: Convert to fraction form
    12,500.76/17,247.12 = 7,122.78/x
  3. Step 3: Cross multiply
    12,500.76x = 17,247.12 × 7,122.78
  4. Step 4: Simplify right side
    12,500.76x = 122,847,441.39
  5. Step 5: Solve for x
    x = 122,847,441.39/12,500.76
  6. Step 6: Final answer
    x = 9,827.20

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Half scale
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Double scale
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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.