Home / 13,388.52-18,471.24-8,081.40

Finding the Fourth Proportional to 13,388.52, 18,471.24 and 8,081.40

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Solution

The fourth proportional to 13,388.52, 18,471.24 and 8,081.40 is: 11,149.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.52 : 18,471.24 = 8,081.40 : x
  2. Step 2: Convert to fraction form
    13,388.52/18,471.24 = 8,081.40/x
  3. Step 3: Cross multiply
    13,388.52x = 18,471.24 × 8,081.40
  4. Step 4: Simplify right side
    13,388.52x = 149,273,478.94
  5. Step 5: Solve for x
    x = 149,273,478.94/13,388.52
  6. Step 6: Final answer
    x = 11,149.36

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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.