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Finding the Fourth Proportional to 28,849, 39,811.66 and 15,601

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Solution

The fourth proportional to 28,849, 39,811.66 and 15,601 is: 21,529.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,849 : 39,811.66 = 15,601 : x
  2. Step 2: Convert to fraction form
    28,849/39,811.66 = 15,601/x
  3. Step 3: Cross multiply
    28,849x = 39,811.66 × 15,601
  4. Step 4: Simplify right side
    28,849x = 621,101,707.66
  5. Step 5: Solve for x
    x = 621,101,707.66/28,849
  6. Step 6: Final answer
    x = 21,529.40

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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.