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Finding the Fourth Proportional to 11,979.66, 17,969.22 and 5,401.20

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Solution

The fourth proportional to 11,979.66, 17,969.22 and 5,401.20 is: 8,101.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.66 : 17,969.22 = 5,401.20 : x
  2. Step 2: Convert to fraction form
    11,979.66/17,969.22 = 5,401.20/x
  3. Step 3: Cross multiply
    11,979.66x = 17,969.22 × 5,401.20
  4. Step 4: Simplify right side
    11,979.66x = 97,055,351.06
  5. Step 5: Solve for x
    x = 97,055,351.06/11,979.66
  6. Step 6: Final answer
    x = 8,101.68

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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.