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Finding the Fourth Proportional to 12,769.15, 17,621.09 and 7,103.61

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Solution

The fourth proportional to 12,769.15, 17,621.09 and 7,103.61 is: 9,802.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,769.15 : 17,621.09 = 7,103.61 : x
  2. Step 2: Convert to fraction form
    12,769.15/17,621.09 = 7,103.61/x
  3. Step 3: Cross multiply
    12,769.15x = 17,621.09 × 7,103.61
  4. Step 4: Simplify right side
    12,769.15x = 125,173,351.13
  5. Step 5: Solve for x
    x = 125,173,351.13/12,769.15
  6. Step 6: Final answer
    x = 9,802.79

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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.