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Finding the Fourth Proportional to 20,112.94, 30,169.79 and 6,965.74

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Solution

The fourth proportional to 20,112.94, 30,169.79 and 6,965.74 is: 10,448.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.94 : 30,169.79 = 6,965.74 : x
  2. Step 2: Convert to fraction form
    20,112.94/30,169.79 = 6,965.74/x
  3. Step 3: Cross multiply
    20,112.94x = 30,169.79 × 6,965.74
  4. Step 4: Simplify right side
    20,112.94x = 210,154,727.32
  5. Step 5: Solve for x
    x = 210,154,727.32/20,112.94
  6. Step 6: Final answer
    x = 10,448.73

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1.5x scale

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.