Home / 13,815.40-20,723.10-3,427.15

Finding the Fourth Proportional to 13,815.40, 20,723.10 and 3,427.15

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Solution

The fourth proportional to 13,815.40, 20,723.10 and 3,427.15 is: 5,140.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.40 : 20,723.10 = 3,427.15 : x
  2. Step 2: Convert to fraction form
    13,815.40/20,723.10 = 3,427.15/x
  3. Step 3: Cross multiply
    13,815.40x = 20,723.10 × 3,427.15
  4. Step 4: Simplify right side
    13,815.40x = 71,021,172.17
  5. Step 5: Solve for x
    x = 71,021,172.17/13,815.40
  6. Step 6: Final answer
    x = 5,140.73

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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.