Home / 13,391.28-18,479.97-8,085.96

Finding the Fourth Proportional to 13,391.28, 18,479.97 and 8,085.96

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Solution

The fourth proportional to 13,391.28, 18,479.97 and 8,085.96 is: 11,158.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.28 : 18,479.97 = 8,085.96 : x
  2. Step 2: Convert to fraction form
    13,391.28/18,479.97 = 8,085.96/x
  3. Step 3: Cross multiply
    13,391.28x = 18,479.97 × 8,085.96
  4. Step 4: Simplify right side
    13,391.28x = 149,428,298.22
  5. Step 5: Solve for x
    x = 149,428,298.22/13,391.28
  6. Step 6: Final answer
    x = 11,158.63

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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.