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Finding the Fourth Proportional to 12,587.97, 18,879.12 and 4,267.65

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Solution

The fourth proportional to 12,587.97, 18,879.12 and 4,267.65 is: 6,400.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.97 : 18,879.12 = 4,267.65 : x
  2. Step 2: Convert to fraction form
    12,587.97/18,879.12 = 4,267.65/x
  3. Step 3: Cross multiply
    12,587.97x = 18,879.12 × 4,267.65
  4. Step 4: Simplify right side
    12,587.97x = 80,569,476.47
  5. Step 5: Solve for x
    x = 80,569,476.47/12,587.97
  6. Step 6: Final answer
    x = 6,400.51

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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.