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Finding the Fourth Proportional to 12,218.52, 18,327.78 and 7,021.08

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Solution

The fourth proportional to 12,218.52, 18,327.78 and 7,021.08 is: 10,531.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.52 : 18,327.78 = 7,021.08 : x
  2. Step 2: Convert to fraction form
    12,218.52/18,327.78 = 7,021.08/x
  3. Step 3: Cross multiply
    12,218.52x = 18,327.78 × 7,021.08
  4. Step 4: Simplify right side
    12,218.52x = 128,680,809.60
  5. Step 5: Solve for x
    x = 128,680,809.60/12,218.52
  6. Step 6: Final answer
    x = 10,531.62

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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.