Home / 13,981.26-20,961.72-6,581.61

Finding the Fourth Proportional to 13,981.26, 20,961.72 and 6,581.61

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Solution

The fourth proportional to 13,981.26, 20,961.72 and 6,581.61 is: 9,867.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.26 : 20,961.72 = 6,581.61 : x
  2. Step 2: Convert to fraction form
    13,981.26/20,961.72 = 6,581.61/x
  3. Step 3: Cross multiply
    13,981.26x = 20,961.72 × 6,581.61
  4. Step 4: Simplify right side
    13,981.26x = 137,961,865.97
  5. Step 5: Solve for x
    x = 137,961,865.97/13,981.26
  6. Step 6: Final answer
    x = 9,867.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.