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Finding the Fourth Proportional to 12,439.60, 18,662.70 and 3,675.40

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Solution

The fourth proportional to 12,439.60, 18,662.70 and 3,675.40 is: 5,514.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.60 : 18,662.70 = 3,675.40 : x
  2. Step 2: Convert to fraction form
    12,439.60/18,662.70 = 3,675.40/x
  3. Step 3: Cross multiply
    12,439.60x = 18,662.70 × 3,675.40
  4. Step 4: Simplify right side
    12,439.60x = 68,592,887.58
  5. Step 5: Solve for x
    x = 68,592,887.58/12,439.60
  6. Step 6: Final answer
    x = 5,514.08

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.