Home / 13,711.42-18,921.67-7,423.75

Finding the Fourth Proportional to 13,711.42, 18,921.67 and 7,423.75

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Solution

The fourth proportional to 13,711.42, 18,921.67 and 7,423.75 is: 10,244.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.42 : 18,921.67 = 7,423.75 : x
  2. Step 2: Convert to fraction form
    13,711.42/18,921.67 = 7,423.75/x
  3. Step 3: Cross multiply
    13,711.42x = 18,921.67 × 7,423.75
  4. Step 4: Simplify right side
    13,711.42x = 140,469,747.66
  5. Step 5: Solve for x
    x = 140,469,747.66/13,711.42
  6. Step 6: Final answer
    x = 10,244.73

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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.