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Finding the Fourth Proportional to 13,220.54, 18,250.20 and 8,446.76

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Solution

The fourth proportional to 13,220.54, 18,250.20 and 8,446.76 is: 11,660.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.54 : 18,250.20 = 8,446.76 : x
  2. Step 2: Convert to fraction form
    13,220.54/18,250.20 = 8,446.76/x
  3. Step 3: Cross multiply
    13,220.54x = 18,250.20 × 8,446.76
  4. Step 4: Simplify right side
    13,220.54x = 154,154,968.10
  5. Step 5: Solve for x
    x = 154,154,968.10/13,220.54
  6. Step 6: Final answer
    x = 11,660.27

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.