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Finding the Fourth Proportional to 28,608.59, 42,912.92 and 11,959.52

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Solution

The fourth proportional to 28,608.59, 42,912.92 and 11,959.52 is: 17,939.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,608.59 : 42,912.92 = 11,959.52 : x
  2. Step 2: Convert to fraction form
    28,608.59/42,912.92 = 11,959.52/x
  3. Step 3: Cross multiply
    28,608.59x = 42,912.92 × 11,959.52
  4. Step 4: Simplify right side
    28,608.59x = 513,217,740.33
  5. Step 5: Solve for x
    x = 513,217,740.33/28,608.59
  6. Step 6: Final answer
    x = 17,939.29

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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.