Home / 21,755.76-30,025.08-13,257.24

Finding the Fourth Proportional to 21,755.76, 30,025.08 and 13,257.24

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Solution

The fourth proportional to 21,755.76, 30,025.08 and 13,257.24 is: 18,296.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,755.76 : 30,025.08 = 13,257.24 : x
  2. Step 2: Convert to fraction form
    21,755.76/30,025.08 = 13,257.24/x
  3. Step 3: Cross multiply
    21,755.76x = 30,025.08 × 13,257.24
  4. Step 4: Simplify right side
    21,755.76x = 398,049,691.58
  5. Step 5: Solve for x
    x = 398,049,691.58/21,755.76
  6. Step 6: Final answer
    x = 18,296.29

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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.