Home / 13,209.40-19,814.10-3,974.20

Finding the Fourth Proportional to 13,209.40, 19,814.10 and 3,974.20

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Solution

The fourth proportional to 13,209.40, 19,814.10 and 3,974.20 is: 5,961.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.40 : 19,814.10 = 3,974.20 : x
  2. Step 2: Convert to fraction form
    13,209.40/19,814.10 = 3,974.20/x
  3. Step 3: Cross multiply
    13,209.40x = 19,814.10 × 3,974.20
  4. Step 4: Simplify right side
    13,209.40x = 78,745,196.22
  5. Step 5: Solve for x
    x = 78,745,196.22/13,209.40
  6. Step 6: Final answer
    x = 5,961.30

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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.