Home / 20,998.11-28,976.89-12,045.04

Finding the Fourth Proportional to 20,998.11, 28,976.89 and 12,045.04

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Solution

The fourth proportional to 20,998.11, 28,976.89 and 12,045.04 is: 16,621.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.11 : 28,976.89 = 12,045.04 : x
  2. Step 2: Convert to fraction form
    20,998.11/28,976.89 = 12,045.04/x
  3. Step 3: Cross multiply
    20,998.11x = 28,976.89 × 12,045.04
  4. Step 4: Simplify right side
    20,998.11x = 349,027,594.02
  5. Step 5: Solve for x
    x = 349,027,594.02/20,998.11
  6. Step 6: Final answer
    x = 16,621.86

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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.