Home / 21,329.22-31,998.54-8,181.61

Finding the Fourth Proportional to 21,329.22, 31,998.54 and 8,181.61

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Solution

The fourth proportional to 21,329.22, 31,998.54 and 8,181.61 is: 12,274.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.22 : 31,998.54 = 8,181.61 : x
  2. Step 2: Convert to fraction form
    21,329.22/31,998.54 = 8,181.61/x
  3. Step 3: Cross multiply
    21,329.22x = 31,998.54 × 8,181.61
  4. Step 4: Simplify right side
    21,329.22x = 261,799,525.53
  5. Step 5: Solve for x
    x = 261,799,525.53/21,329.22
  6. Step 6: Final answer
    x = 12,274.22

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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.