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Finding the Fourth Proportional to 12,109.86, 16,711.93 and 6,805.17

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Solution

The fourth proportional to 12,109.86, 16,711.93 and 6,805.17 is: 9,391.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.86 : 16,711.93 = 6,805.17 : x
  2. Step 2: Convert to fraction form
    12,109.86/16,711.93 = 6,805.17/x
  3. Step 3: Cross multiply
    12,109.86x = 16,711.93 × 6,805.17
  4. Step 4: Simplify right side
    12,109.86x = 113,727,524.68
  5. Step 5: Solve for x
    x = 113,727,524.68/12,109.86
  6. Step 6: Final answer
    x = 9,391.32

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1.5x scale

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.