Home / 21,405.54-32,119.68-8,087.61

Finding the Fourth Proportional to 21,405.54, 32,119.68 and 8,087.61

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Solution

The fourth proportional to 21,405.54, 32,119.68 and 8,087.61 is: 12,135.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.54 : 32,119.68 = 8,087.61 : x
  2. Step 2: Convert to fraction form
    21,405.54/32,119.68 = 8,087.61/x
  3. Step 3: Cross multiply
    21,405.54x = 32,119.68 × 8,087.61
  4. Step 4: Simplify right side
    21,405.54x = 259,771,445.16
  5. Step 5: Solve for x
    x = 259,771,445.16/21,405.54
  6. Step 6: Final answer
    x = 12,135.71

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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.