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Finding the Fourth Proportional to 28,408.85, 42,613.37 and 8,687.37

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Solution

The fourth proportional to 28,408.85, 42,613.37 and 8,687.37 is: 13,031.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,408.85 : 42,613.37 = 8,687.37 : x
  2. Step 2: Convert to fraction form
    28,408.85/42,613.37 = 8,687.37/x
  3. Step 3: Cross multiply
    28,408.85x = 42,613.37 × 8,687.37
  4. Step 4: Simplify right side
    28,408.85x = 370,198,112.14
  5. Step 5: Solve for x
    x = 370,198,112.14/28,408.85
  6. Step 6: Final answer
    x = 13,031.08

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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.