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Finding the Fourth Proportional to 18,664.20, 27,988.20 and 6,179.40

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Solution

The fourth proportional to 18,664.20, 27,988.20 and 6,179.40 is: 9,266.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,664.20 : 27,988.20 = 6,179.40 : x
  2. Step 2: Convert to fraction form
    18,664.20/27,988.20 = 6,179.40/x
  3. Step 3: Cross multiply
    18,664.20x = 27,988.20 × 6,179.40
  4. Step 4: Simplify right side
    18,664.20x = 172,950,283.08
  5. Step 5: Solve for x
    x = 172,950,283.08/18,664.20
  6. Step 6: Final answer
    x = 9,266.42

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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.