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Finding the Fourth Proportional to 40,989.88, 61,478.68 and 11,404.68

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Solution

The fourth proportional to 40,989.88, 61,478.68 and 11,404.68 is: 17,105.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,989.88 : 61,478.68 = 11,404.68 : x
  2. Step 2: Convert to fraction form
    40,989.88/61,478.68 = 11,404.68/x
  3. Step 3: Cross multiply
    40,989.88x = 61,478.68 × 11,404.68
  4. Step 4: Simplify right side
    40,989.88x = 701,144,672.22
  5. Step 5: Solve for x
    x = 701,144,672.22/40,989.88
  6. Step 6: Final answer
    x = 17,105.31

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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.