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Finding the Fourth Proportional to 18,662.10, 27,999.55 and 8,281.30

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Solution

The fourth proportional to 18,662.10, 27,999.55 and 8,281.30 is: 12,424.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.10 : 27,999.55 = 8,281.30 : x
  2. Step 2: Convert to fraction form
    18,662.10/27,999.55 = 8,281.30/x
  3. Step 3: Cross multiply
    18,662.10x = 27,999.55 × 8,281.30
  4. Step 4: Simplify right side
    18,662.10x = 231,872,673.42
  5. Step 5: Solve for x
    x = 231,872,673.42/18,662.10
  6. Step 6: Final answer
    x = 12,424.79

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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.