Home / 21,251.11-31,876.30-7,399.75

Finding the Fourth Proportional to 21,251.11, 31,876.30 and 7,399.75

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Solution

The fourth proportional to 21,251.11, 31,876.30 and 7,399.75 is: 11,099.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.11 : 31,876.30 = 7,399.75 : x
  2. Step 2: Convert to fraction form
    21,251.11/31,876.30 = 7,399.75/x
  3. Step 3: Cross multiply
    21,251.11x = 31,876.30 × 7,399.75
  4. Step 4: Simplify right side
    21,251.11x = 235,876,650.93
  5. Step 5: Solve for x
    x = 235,876,650.93/21,251.11
  6. Step 6: Final answer
    x = 11,099.50

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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.