Home / 12,138.36-18,170.28-8,850.66

Finding the Fourth Proportional to 12,138.36, 18,170.28 and 8,850.66

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Solution

The fourth proportional to 12,138.36, 18,170.28 and 8,850.66 is: 13,248.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.36 : 18,170.28 = 8,850.66 : x
  2. Step 2: Convert to fraction form
    12,138.36/18,170.28 = 8,850.66/x
  3. Step 3: Cross multiply
    12,138.36x = 18,170.28 × 8,850.66
  4. Step 4: Simplify right side
    12,138.36x = 160,818,970.38
  5. Step 5: Solve for x
    x = 160,818,970.38/12,138.36
  6. Step 6: Final answer
    x = 13,248.82

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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.