Home / 21,217.28-31,826.72-8,067.20

Finding the Fourth Proportional to 21,217.28, 31,826.72 and 8,067.20

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Solution

The fourth proportional to 21,217.28, 31,826.72 and 8,067.20 is: 12,101.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.28 : 31,826.72 = 8,067.20 : x
  2. Step 2: Convert to fraction form
    21,217.28/31,826.72 = 8,067.20/x
  3. Step 3: Cross multiply
    21,217.28x = 31,826.72 × 8,067.20
  4. Step 4: Simplify right side
    21,217.28x = 256,752,515.58
  5. Step 5: Solve for x
    x = 256,752,515.58/21,217.28
  6. Step 6: Final answer
    x = 12,101.10

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1.5x scale

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.