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Finding the Fourth Proportional to 40,894.99, 61,306.09 and 15,929.21

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Solution

The fourth proportional to 40,894.99, 61,306.09 and 15,929.21 is: 23,879.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,894.99 : 61,306.09 = 15,929.21 : x
  2. Step 2: Convert to fraction form
    40,894.99/61,306.09 = 15,929.21/x
  3. Step 3: Cross multiply
    40,894.99x = 61,306.09 × 15,929.21
  4. Step 4: Simplify right side
    40,894.99x = 976,557,581.89
  5. Step 5: Solve for x
    x = 976,557,581.89/40,894.99
  6. Step 6: Final answer
    x = 23,879.64

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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.