Home / 12,220.17-18,330.03-3,900.12

Finding the Fourth Proportional to 12,220.17, 18,330.03 and 3,900.12

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Solution

The fourth proportional to 12,220.17, 18,330.03 and 3,900.12 is: 5,850.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.17 : 18,330.03 = 3,900.12 : x
  2. Step 2: Convert to fraction form
    12,220.17/18,330.03 = 3,900.12/x
  3. Step 3: Cross multiply
    12,220.17x = 18,330.03 × 3,900.12
  4. Step 4: Simplify right side
    12,220.17x = 71,489,316.60
  5. Step 5: Solve for x
    x = 71,489,316.60/12,220.17
  6. Step 6: Final answer
    x = 5,850.11

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Half scale
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Double 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.