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Finding the Fourth Proportional to 12,138.54, 16,751.18 and 7,103.73

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Solution

The fourth proportional to 12,138.54, 16,751.18 and 7,103.73 is: 9,803.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.54 : 16,751.18 = 7,103.73 : x
  2. Step 2: Convert to fraction form
    12,138.54/16,751.18 = 7,103.73/x
  3. Step 3: Cross multiply
    12,138.54x = 16,751.18 × 7,103.73
  4. Step 4: Simplify right side
    12,138.54x = 118,995,859.90
  5. Step 5: Solve for x
    x = 118,995,859.90/12,138.54
  6. Step 6: Final answer
    x = 9,803.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.