Home / 13,321.60-19,982.40-7,100.80

Finding the Fourth Proportional to 13,321.60, 19,982.40 and 7,100.80

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Solution

The fourth proportional to 13,321.60, 19,982.40 and 7,100.80 is: 10,651.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.60 : 19,982.40 = 7,100.80 : x
  2. Step 2: Convert to fraction form
    13,321.60/19,982.40 = 7,100.80/x
  3. Step 3: Cross multiply
    13,321.60x = 19,982.40 × 7,100.80
  4. Step 4: Simplify right side
    13,321.60x = 141,891,025.92
  5. Step 5: Solve for x
    x = 141,891,025.92/13,321.60
  6. Step 6: Final answer
    x = 10,651.20

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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.