Home / 21,229.85-31,843.62-8,749.64

Finding the Fourth Proportional to 21,229.85, 31,843.62 and 8,749.64

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Solution

The fourth proportional to 21,229.85, 31,843.62 and 8,749.64 is: 13,123.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,229.85 : 31,843.62 = 8,749.64 : x
  2. Step 2: Convert to fraction form
    21,229.85/31,843.62 = 8,749.64/x
  3. Step 3: Cross multiply
    21,229.85x = 31,843.62 × 8,749.64
  4. Step 4: Simplify right side
    21,229.85x = 278,620,052.08
  5. Step 5: Solve for x
    x = 278,620,052.08/21,229.85
  6. Step 6: Final answer
    x = 13,123.98

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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.