Home / 31,388.28-43,317.84-21,959.88

Finding the Fourth Proportional to 31,388.28, 43,317.84 and 21,959.88

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Solution

The fourth proportional to 31,388.28, 43,317.84 and 21,959.88 is: 30,306.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,388.28 : 43,317.84 = 21,959.88 : x
  2. Step 2: Convert to fraction form
    31,388.28/43,317.84 = 21,959.88/x
  3. Step 3: Cross multiply
    31,388.28x = 43,317.84 × 21,959.88
  4. Step 4: Simplify right side
    31,388.28x = 951,254,568.26
  5. Step 5: Solve for x
    x = 951,254,568.26/31,388.28
  6. Step 6: Final answer
    x = 30,306.04

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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.