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Finding the Fourth Proportional to 8,587.98, 12,879.18 and 4,427.43

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Solution

The fourth proportional to 8,587.98, 12,879.18 and 4,427.43 is: 6,639.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,587.98 : 12,879.18 = 4,427.43 : x
  2. Step 2: Convert to fraction form
    8,587.98/12,879.18 = 4,427.43/x
  3. Step 3: Cross multiply
    8,587.98x = 12,879.18 × 4,427.43
  4. Step 4: Simplify right side
    8,587.98x = 57,021,667.91
  5. Step 5: Solve for x
    x = 57,021,667.91/8,587.98
  6. Step 6: Final answer
    x = 6,639.71

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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.