Home / 18,808.61-28,178.31-11,787.30

Finding the Fourth Proportional to 18,808.61, 28,178.31 and 11,787.30

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Solution

The fourth proportional to 18,808.61, 28,178.31 and 11,787.30 is: 17,659.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.61 : 28,178.31 = 11,787.30 : x
  2. Step 2: Convert to fraction form
    18,808.61/28,178.31 = 11,787.30/x
  3. Step 3: Cross multiply
    18,808.61x = 28,178.31 × 11,787.30
  4. Step 4: Simplify right side
    18,808.61x = 332,146,058.96
  5. Step 5: Solve for x
    x = 332,146,058.96/18,808.61
  6. Step 6: Final answer
    x = 17,659.26

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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.