Home / 9,172.39-12,660.03-5,395.78

Finding the Fourth Proportional to 9,172.39, 12,660.03 and 5,395.78

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Solution

The fourth proportional to 9,172.39, 12,660.03 and 5,395.78 is: 7,447.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,172.39 : 12,660.03 = 5,395.78 : x
  2. Step 2: Convert to fraction form
    9,172.39/12,660.03 = 5,395.78/x
  3. Step 3: Cross multiply
    9,172.39x = 12,660.03 × 5,395.78
  4. Step 4: Simplify right side
    9,172.39x = 68,310,736.67
  5. Step 5: Solve for x
    x = 68,310,736.67/9,172.39
  6. Step 6: Final answer
    x = 7,447.43

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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.