Home / 21,278.91-31,919.85-7,233.21

Finding the Fourth Proportional to 21,278.91, 31,919.85 and 7,233.21

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Solution

The fourth proportional to 21,278.91, 31,919.85 and 7,233.21 is: 10,850.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.91 : 31,919.85 = 7,233.21 : x
  2. Step 2: Convert to fraction form
    21,278.91/31,919.85 = 7,233.21/x
  3. Step 3: Cross multiply
    21,278.91x = 31,919.85 × 7,233.21
  4. Step 4: Simplify right side
    21,278.91x = 230,882,978.22
  5. Step 5: Solve for x
    x = 230,882,978.22/21,278.91
  6. Step 6: Final answer
    x = 10,850.32

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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.