Home / 18,787.56-28,181.34-7,691.76

Finding the Fourth Proportional to 18,787.56, 28,181.34 and 7,691.76

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Solution

The fourth proportional to 18,787.56, 28,181.34 and 7,691.76 is: 11,537.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.56 : 28,181.34 = 7,691.76 : x
  2. Step 2: Convert to fraction form
    18,787.56/28,181.34 = 7,691.76/x
  3. Step 3: Cross multiply
    18,787.56x = 28,181.34 × 7,691.76
  4. Step 4: Simplify right side
    18,787.56x = 216,764,103.76
  5. Step 5: Solve for x
    x = 216,764,103.76/18,787.56
  6. Step 6: Final answer
    x = 11,537.64

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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.