Home / 18,679.20-25,760.28-12,380.64

Finding the Fourth Proportional to 18,679.20, 25,760.28 and 12,380.64

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Solution

The fourth proportional to 18,679.20, 25,760.28 and 12,380.64 is: 17,074.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.20 : 25,760.28 = 12,380.64 : x
  2. Step 2: Convert to fraction form
    18,679.20/25,760.28 = 12,380.64/x
  3. Step 3: Cross multiply
    18,679.20x = 25,760.28 × 12,380.64
  4. Step 4: Simplify right side
    18,679.20x = 318,928,752.98
  5. Step 5: Solve for x
    x = 318,928,752.98/18,679.20
  6. Step 6: Final answer
    x = 17,074.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.