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Finding the Fourth Proportional to 12,388.59, 18,588.95 and 6,149.19

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Solution

The fourth proportional to 12,388.59, 18,588.95 and 6,149.19 is: 9,226.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,388.59 : 18,588.95 = 6,149.19 : x
  2. Step 2: Convert to fraction form
    12,388.59/18,588.95 = 6,149.19/x
  3. Step 3: Cross multiply
    12,388.59x = 18,588.95 × 6,149.19
  4. Step 4: Simplify right side
    12,388.59x = 114,306,954.70
  5. Step 5: Solve for x
    x = 114,306,954.70/12,388.59
  6. Step 6: Final answer
    x = 9,226.79

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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.