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Finding the Fourth Proportional to 25,956, 38,959.92 and 18,957.60

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Solution

The fourth proportional to 25,956, 38,959.92 and 18,957.60 is: 28,455.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,956 : 38,959.92 = 18,957.60 : x
  2. Step 2: Convert to fraction form
    25,956/38,959.92 = 18,957.60/x
  3. Step 3: Cross multiply
    25,956x = 38,959.92 × 18,957.60
  4. Step 4: Simplify right side
    25,956x = 738,586,579.39
  5. Step 5: Solve for x
    x = 738,586,579.39/25,956
  6. Step 6: Final answer
    x = 28,455.33

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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.