Home / 21,229.28-31,844.16-7,378.40

Finding the Fourth Proportional to 21,229.28, 31,844.16 and 7,378.40

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Solution

The fourth proportional to 21,229.28, 31,844.16 and 7,378.40 is: 11,067.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,229.28 : 31,844.16 = 7,378.40 : x
  2. Step 2: Convert to fraction form
    21,229.28/31,844.16 = 7,378.40/x
  3. Step 3: Cross multiply
    21,229.28x = 31,844.16 × 7,378.40
  4. Step 4: Simplify right side
    21,229.28x = 234,958,950.14
  5. Step 5: Solve for x
    x = 234,958,950.14/21,229.28
  6. Step 6: Final answer
    x = 11,067.68

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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.