Home / 12,011.28-18,016.92-4,218.30

Finding the Fourth Proportional to 12,011.28, 18,016.92 and 4,218.30

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Solution

The fourth proportional to 12,011.28, 18,016.92 and 4,218.30 is: 6,327.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,011.28 : 18,016.92 = 4,218.30 : x
  2. Step 2: Convert to fraction form
    12,011.28/18,016.92 = 4,218.30/x
  3. Step 3: Cross multiply
    12,011.28x = 18,016.92 × 4,218.30
  4. Step 4: Simplify right side
    12,011.28x = 76,000,773.64
  5. Step 5: Solve for x
    x = 76,000,773.64/12,011.28
  6. Step 6: Final answer
    x = 6,327.45

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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.