Home / 12,608.12-18,912.20-4,288.20

Finding the Fourth Proportional to 12,608.12, 18,912.20 and 4,288.20

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Solution

The fourth proportional to 12,608.12, 18,912.20 and 4,288.20 is: 6,432.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,608.12 : 18,912.20 = 4,288.20 : x
  2. Step 2: Convert to fraction form
    12,608.12/18,912.20 = 4,288.20/x
  3. Step 3: Cross multiply
    12,608.12x = 18,912.20 × 4,288.20
  4. Step 4: Simplify right side
    12,608.12x = 81,099,296.04
  5. Step 5: Solve for x
    x = 81,099,296.04/12,608.12
  6. Step 6: Final answer
    x = 6,432.31

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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.