Home / 13,207.40-19,811.10-3,972.20

Finding the Fourth Proportional to 13,207.40, 19,811.10 and 3,972.20

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Solution

The fourth proportional to 13,207.40, 19,811.10 and 3,972.20 is: 5,958.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,207.40 : 19,811.10 = 3,972.20 : x
  2. Step 2: Convert to fraction form
    13,207.40/19,811.10 = 3,972.20/x
  3. Step 3: Cross multiply
    13,207.40x = 19,811.10 × 3,972.20
  4. Step 4: Simplify right side
    13,207.40x = 78,693,651.42
  5. Step 5: Solve for x
    x = 78,693,651.42/13,207.40
  6. Step 6: Final answer
    x = 5,958.30

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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.