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Finding the Fourth Proportional to 7,213.75, 9,954.79 and 4,069.69

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Solution

The fourth proportional to 7,213.75, 9,954.79 and 4,069.69 is: 5,616.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,213.75 : 9,954.79 = 4,069.69 : x
  2. Step 2: Convert to fraction form
    7,213.75/9,954.79 = 4,069.69/x
  3. Step 3: Cross multiply
    7,213.75x = 9,954.79 × 4,069.69
  4. Step 4: Simplify right side
    7,213.75x = 40,512,909.32
  5. Step 5: Solve for x
    x = 40,512,909.32/7,213.75
  6. Step 6: Final answer
    x = 5,616.07

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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.