Home / 12,587.12-18,879.46-3,822.11

Finding the Fourth Proportional to 12,587.12, 18,879.46 and 3,822.11

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Solution

The fourth proportional to 12,587.12, 18,879.46 and 3,822.11 is: 5,732.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.12 : 18,879.46 = 3,822.11 : x
  2. Step 2: Convert to fraction form
    12,587.12/18,879.46 = 3,822.11/x
  3. Step 3: Cross multiply
    12,587.12x = 18,879.46 × 3,822.11
  4. Step 4: Simplify right side
    12,587.12x = 72,159,372.86
  5. Step 5: Solve for x
    x = 72,159,372.86/12,587.12
  6. Step 6: Final answer
    x = 5,732.79

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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.