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Finding the Fourth Proportional to 40,556.81, 60,841 and 12,479.20

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Solution

The fourth proportional to 40,556.81, 60,841 and 12,479.20 is: 18,720.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,556.81 : 60,841 = 12,479.20 : x
  2. Step 2: Convert to fraction form
    40,556.81/60,841 = 12,479.20/x
  3. Step 3: Cross multiply
    40,556.81x = 60,841 × 12,479.20
  4. Step 4: Simplify right side
    40,556.81x = 759,247,007.20
  5. Step 5: Solve for x
    x = 759,247,007.20/40,556.81
  6. Step 6: Final answer
    x = 18,720.58

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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.