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Finding the Fourth Proportional to 15,180.78, 20,948.49 and 8,466.02

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Solution

The fourth proportional to 15,180.78, 20,948.49 and 8,466.02 is: 11,682.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,180.78 : 20,948.49 = 8,466.02 : x
  2. Step 2: Convert to fraction form
    15,180.78/20,948.49 = 8,466.02/x
  3. Step 3: Cross multiply
    15,180.78x = 20,948.49 × 8,466.02
  4. Step 4: Simplify right side
    15,180.78x = 177,350,230.57
  5. Step 5: Solve for x
    x = 177,350,230.57/15,180.78
  6. Step 6: Final answer
    x = 11,682.55

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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.