Home / 13,687.74-18,889.38-8,310.33

Finding the Fourth Proportional to 13,687.74, 18,889.38 and 8,310.33

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Solution

The fourth proportional to 13,687.74, 18,889.38 and 8,310.33 is: 11,468.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.74 : 18,889.38 = 8,310.33 : x
  2. Step 2: Convert to fraction form
    13,687.74/18,889.38 = 8,310.33/x
  3. Step 3: Cross multiply
    13,687.74x = 18,889.38 × 8,310.33
  4. Step 4: Simplify right side
    13,687.74x = 156,976,981.30
  5. Step 5: Solve for x
    x = 156,976,981.30/13,687.74
  6. Step 6: Final answer
    x = 11,468.44

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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.