Home / 12,191.45-18,287.18-3,872.35

Finding the Fourth Proportional to 12,191.45, 18,287.18 and 3,872.35

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Solution

The fourth proportional to 12,191.45, 18,287.18 and 3,872.35 is: 5,808.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.45 : 18,287.18 = 3,872.35 : x
  2. Step 2: Convert to fraction form
    12,191.45/18,287.18 = 3,872.35/x
  3. Step 3: Cross multiply
    12,191.45x = 18,287.18 × 3,872.35
  4. Step 4: Simplify right side
    12,191.45x = 70,814,361.47
  5. Step 5: Solve for x
    x = 70,814,361.47/12,191.45
  6. Step 6: Final answer
    x = 5,808.53

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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.