Home / 15,449.78-21,335.80-13,198.52

Finding the Fourth Proportional to 15,449.78, 21,335.80 and 13,198.52

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Solution

The fourth proportional to 15,449.78, 21,335.80 and 13,198.52 is: 18,226.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,449.78 : 21,335.80 = 13,198.52 : x
  2. Step 2: Convert to fraction form
    15,449.78/21,335.80 = 13,198.52/x
  3. Step 3: Cross multiply
    15,449.78x = 21,335.80 × 13,198.52
  4. Step 4: Simplify right side
    15,449.78x = 281,600,983.02
  5. Step 5: Solve for x
    x = 281,600,983.02/15,449.78
  6. Step 6: Final answer
    x = 18,226.86

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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.