Home / 12,121.78-18,182.70-3,356.72

Finding the Fourth Proportional to 12,121.78, 18,182.70 and 3,356.72

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Solution

The fourth proportional to 12,121.78, 18,182.70 and 3,356.72 is: 5,035.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.78 : 18,182.70 = 3,356.72 : x
  2. Step 2: Convert to fraction form
    12,121.78/18,182.70 = 3,356.72/x
  3. Step 3: Cross multiply
    12,121.78x = 18,182.70 × 3,356.72
  4. Step 4: Simplify right side
    12,121.78x = 61,034,232.74
  5. Step 5: Solve for x
    x = 61,034,232.74/12,121.78
  6. Step 6: Final answer
    x = 5,035.09

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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.