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Finding the Fourth Proportional to 29,651.78, 40,929.86 and 18,329.96

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Solution

The fourth proportional to 29,651.78, 40,929.86 and 18,329.96 is: 25,301.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,651.78 : 40,929.86 = 18,329.96 : x
  2. Step 2: Convert to fraction form
    29,651.78/40,929.86 = 18,329.96/x
  3. Step 3: Cross multiply
    29,651.78x = 40,929.86 × 18,329.96
  4. Step 4: Simplify right side
    29,651.78x = 750,242,696.61
  5. Step 5: Solve for x
    x = 750,242,696.61/29,651.78
  6. Step 6: Final answer
    x = 25,301.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.