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Finding the Fourth Proportional to 8,981.93, 13,472.98 and 3,138.56

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Solution

The fourth proportional to 8,981.93, 13,472.98 and 3,138.56 is: 4,707.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.93 : 13,472.98 = 3,138.56 : x
  2. Step 2: Convert to fraction form
    8,981.93/13,472.98 = 3,138.56/x
  3. Step 3: Cross multiply
    8,981.93x = 13,472.98 × 3,138.56
  4. Step 4: Simplify right side
    8,981.93x = 42,285,680.90
  5. Step 5: Solve for x
    x = 42,285,680.90/8,981.93
  6. Step 6: Final answer
    x = 4,707.86

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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.