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Finding the Fourth Proportional to 18,494.95, 27,758.91 and 8,639.79

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Solution

The fourth proportional to 18,494.95, 27,758.91 and 8,639.79 is: 12,967.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,494.95 : 27,758.91 = 8,639.79 : x
  2. Step 2: Convert to fraction form
    18,494.95/27,758.91 = 8,639.79/x
  3. Step 3: Cross multiply
    18,494.95x = 27,758.91 × 8,639.79
  4. Step 4: Simplify right side
    18,494.95x = 239,831,153.03
  5. Step 5: Solve for x
    x = 239,831,153.03/18,494.95
  6. Step 6: Final answer
    x = 12,967.39

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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.