Home / 21,297.06-31,925.88-8,138.88

Finding the Fourth Proportional to 21,297.06, 31,925.88 and 8,138.88

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Solution

The fourth proportional to 21,297.06, 31,925.88 and 8,138.88 is: 12,200.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,297.06 : 31,925.88 = 8,138.88 : x
  2. Step 2: Convert to fraction form
    21,297.06/31,925.88 = 8,138.88/x
  3. Step 3: Cross multiply
    21,297.06x = 31,925.88 × 8,138.88
  4. Step 4: Simplify right side
    21,297.06x = 259,840,906.21
  5. Step 5: Solve for x
    x = 259,840,906.21/21,297.06
  6. Step 6: Final answer
    x = 12,200.79

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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.