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Finding the Fourth Proportional to 12,246.78, 18,369.54 and 3,480.54

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Solution

The fourth proportional to 12,246.78, 18,369.54 and 3,480.54 is: 5,220.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,246.78 : 18,369.54 = 3,480.54 : x
  2. Step 2: Convert to fraction form
    12,246.78/18,369.54 = 3,480.54/x
  3. Step 3: Cross multiply
    12,246.78x = 18,369.54 × 3,480.54
  4. Step 4: Simplify right side
    12,246.78x = 63,935,918.75
  5. Step 5: Solve for x
    x = 63,935,918.75/12,246.78
  6. Step 6: Final answer
    x = 5,220.63

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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.