Home / 20,687.32-31,018.02-13,659.88

Finding the Fourth Proportional to 20,687.32, 31,018.02 and 13,659.88

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Solution

The fourth proportional to 20,687.32, 31,018.02 and 13,659.88 is: 20,481.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.32 : 31,018.02 = 13,659.88 : x
  2. Step 2: Convert to fraction form
    20,687.32/31,018.02 = 13,659.88/x
  3. Step 3: Cross multiply
    20,687.32x = 31,018.02 × 13,659.88
  4. Step 4: Simplify right side
    20,687.32x = 423,702,431.04
  5. Step 5: Solve for x
    x = 423,702,431.04/20,687.32
  6. Step 6: Final answer
    x = 20,481.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.