Home / 13,439.87-20,157.17-12,773.09

Finding the Fourth Proportional to 13,439.87, 20,157.17 and 12,773.09

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Solution

The fourth proportional to 13,439.87, 20,157.17 and 12,773.09 is: 19,157.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.87 : 20,157.17 = 12,773.09 : x
  2. Step 2: Convert to fraction form
    13,439.87/20,157.17 = 12,773.09/x
  3. Step 3: Cross multiply
    13,439.87x = 20,157.17 × 12,773.09
  4. Step 4: Simplify right side
    13,439.87x = 257,469,181.90
  5. Step 5: Solve for x
    x = 257,469,181.90/13,439.87
  6. Step 6: Final answer
    x = 19,157.13

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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.