Home / 21,277.03-31,906.10-8,120.20

Finding the Fourth Proportional to 21,277.03, 31,906.10 and 8,120.20

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Solution

The fourth proportional to 21,277.03, 31,906.10 and 8,120.20 is: 12,176.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.03 : 31,906.10 = 8,120.20 : x
  2. Step 2: Convert to fraction form
    21,277.03/31,906.10 = 8,120.20/x
  3. Step 3: Cross multiply
    21,277.03x = 31,906.10 × 8,120.20
  4. Step 4: Simplify right side
    21,277.03x = 259,083,753.69
  5. Step 5: Solve for x
    x = 259,083,753.69/21,277.03
  6. Step 6: Final answer
    x = 12,176.69

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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.