Home / 12,220.56-16,861.42-7,184.38

Finding the Fourth Proportional to 12,220.56, 16,861.42 and 7,184.38

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Solution

The fourth proportional to 12,220.56, 16,861.42 and 7,184.38 is: 9,912.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.56 : 16,861.42 = 7,184.38 : x
  2. Step 2: Convert to fraction form
    12,220.56/16,861.42 = 7,184.38/x
  3. Step 3: Cross multiply
    12,220.56x = 16,861.42 × 7,184.38
  4. Step 4: Simplify right side
    12,220.56x = 121,138,848.62
  5. Step 5: Solve for x
    x = 121,138,848.62/12,220.56
  6. Step 6: Final answer
    x = 9,912.71

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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.