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Finding the Fourth Proportional to 12,561.48, 18,845.04 and 4,241.20

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Solution

The fourth proportional to 12,561.48, 18,845.04 and 4,241.20 is: 6,362.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.48 : 18,845.04 = 4,241.20 : x
  2. Step 2: Convert to fraction form
    12,561.48/18,845.04 = 4,241.20/x
  3. Step 3: Cross multiply
    12,561.48x = 18,845.04 × 4,241.20
  4. Step 4: Simplify right side
    12,561.48x = 79,925,583.65
  5. Step 5: Solve for x
    x = 79,925,583.65/12,561.48
  6. Step 6: Final answer
    x = 6,362.75

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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.