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Finding the Fourth Proportional to 18,759.54, 28,135.12 and 5,610.20

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Solution

The fourth proportional to 18,759.54, 28,135.12 and 5,610.20 is: 8,414.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.54 : 28,135.12 = 5,610.20 : x
  2. Step 2: Convert to fraction form
    18,759.54/28,135.12 = 5,610.20/x
  3. Step 3: Cross multiply
    18,759.54x = 28,135.12 × 5,610.20
  4. Step 4: Simplify right side
    18,759.54x = 157,843,622.17
  5. Step 5: Solve for x
    x = 157,843,622.17/18,759.54
  6. Step 6: Final answer
    x = 8,414.05

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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.