Home / 13,380.28-18,463.19-7,716.88

Finding the Fourth Proportional to 13,380.28, 18,463.19 and 7,716.88

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Solution

The fourth proportional to 13,380.28, 18,463.19 and 7,716.88 is: 10,648.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,380.28 : 18,463.19 = 7,716.88 : x
  2. Step 2: Convert to fraction form
    13,380.28/18,463.19 = 7,716.88/x
  3. Step 3: Cross multiply
    13,380.28x = 18,463.19 × 7,716.88
  4. Step 4: Simplify right side
    13,380.28x = 142,478,221.65
  5. Step 5: Solve for x
    x = 142,478,221.65/13,380.28
  6. Step 6: Final answer
    x = 10,648.37

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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.