Home / 13,711.41-18,921.60-7,742.73

Finding the Fourth Proportional to 13,711.41, 18,921.60 and 7,742.73

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Solution

The fourth proportional to 13,711.41, 18,921.60 and 7,742.73 is: 10,684.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.41 : 18,921.60 = 7,742.73 : x
  2. Step 2: Convert to fraction form
    13,711.41/18,921.60 = 7,742.73/x
  3. Step 3: Cross multiply
    13,711.41x = 18,921.60 × 7,742.73
  4. Step 4: Simplify right side
    13,711.41x = 146,504,839.97
  5. Step 5: Solve for x
    x = 146,504,839.97/13,711.41
  6. Step 6: Final answer
    x = 10,684.89

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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.