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Finding the Fourth Proportional to 8,693.80, 13,040.71 and 2,119.95

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Solution

The fourth proportional to 8,693.80, 13,040.71 and 2,119.95 is: 3,179.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,693.80 : 13,040.71 = 2,119.95 : x
  2. Step 2: Convert to fraction form
    8,693.80/13,040.71 = 2,119.95/x
  3. Step 3: Cross multiply
    8,693.80x = 13,040.71 × 2,119.95
  4. Step 4: Simplify right side
    8,693.80x = 27,645,647.86
  5. Step 5: Solve for x
    x = 27,645,647.86/8,693.80
  6. Step 6: Final answer
    x = 3,179.93

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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.