Home / 28,380.90-39,163.92-16,442.18

Finding the Fourth Proportional to 28,380.90, 39,163.92 and 16,442.18

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Solution

The fourth proportional to 28,380.90, 39,163.92 and 16,442.18 is: 22,689.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.90 : 39,163.92 = 16,442.18 : x
  2. Step 2: Convert to fraction form
    28,380.90/39,163.92 = 16,442.18/x
  3. Step 3: Cross multiply
    28,380.90x = 39,163.92 × 16,442.18
  4. Step 4: Simplify right side
    28,380.90x = 643,940,026.33
  5. Step 5: Solve for x
    x = 643,940,026.33/28,380.90
  6. Step 6: Final answer
    x = 22,689.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.