Home / 13,081.50-18,040.50-9,732.78

Finding the Fourth Proportional to 13,081.50, 18,040.50 and 9,732.78

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Solution

The fourth proportional to 13,081.50, 18,040.50 and 9,732.78 is: 13,422.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,081.50 : 18,040.50 = 9,732.78 : x
  2. Step 2: Convert to fraction form
    13,081.50/18,040.50 = 9,732.78/x
  3. Step 3: Cross multiply
    13,081.50x = 18,040.50 × 9,732.78
  4. Step 4: Simplify right side
    13,081.50x = 175,584,217.59
  5. Step 5: Solve for x
    x = 175,584,217.59/13,081.50
  6. Step 6: Final answer
    x = 13,422.33

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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.