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Finding the Fourth Proportional to 18,509.25, 27,763.42 and 8,659.55

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Solution

The fourth proportional to 18,509.25, 27,763.42 and 8,659.55 is: 12,989.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,509.25 : 27,763.42 = 8,659.55 : x
  2. Step 2: Convert to fraction form
    18,509.25/27,763.42 = 8,659.55/x
  3. Step 3: Cross multiply
    18,509.25x = 27,763.42 × 8,659.55
  4. Step 4: Simplify right side
    18,509.25x = 240,418,787.66
  5. Step 5: Solve for x
    x = 240,418,787.66/18,509.25
  6. Step 6: Final answer
    x = 12,989.11

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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.