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Finding the Fourth Proportional to 8,981.90, 13,471.90 and 2,408.75

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Solution

The fourth proportional to 8,981.90, 13,471.90 and 2,408.75 is: 3,612.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.90 : 13,471.90 = 2,408.75 : x
  2. Step 2: Convert to fraction form
    8,981.90/13,471.90 = 2,408.75/x
  3. Step 3: Cross multiply
    8,981.90x = 13,471.90 × 2,408.75
  4. Step 4: Simplify right side
    8,981.90x = 32,450,439.13
  5. Step 5: Solve for x
    x = 32,450,439.13/8,981.90
  6. Step 6: Final answer
    x = 3,612.87

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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.