Home / 12,170.78-18,168.13-10,694.55

Finding the Fourth Proportional to 12,170.78, 18,168.13 and 10,694.55

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Solution

The fourth proportional to 12,170.78, 18,168.13 and 10,694.55 is: 15,964.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,170.78 : 18,168.13 = 10,694.55 : x
  2. Step 2: Convert to fraction form
    12,170.78/18,168.13 = 10,694.55/x
  3. Step 3: Cross multiply
    12,170.78x = 18,168.13 × 10,694.55
  4. Step 4: Simplify right side
    12,170.78x = 194,299,921.22
  5. Step 5: Solve for x
    x = 194,299,921.22/12,170.78
  6. Step 6: Final answer
    x = 15,964.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.