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Finding the Fourth Proportional to 7,223.45, 9,968.34 and 3,911.45

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Solution

The fourth proportional to 7,223.45, 9,968.34 and 3,911.45 is: 5,397.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,223.45 : 9,968.34 = 3,911.45 : x
  2. Step 2: Convert to fraction form
    7,223.45/9,968.34 = 3,911.45/x
  3. Step 3: Cross multiply
    7,223.45x = 9,968.34 × 3,911.45
  4. Step 4: Simplify right side
    7,223.45x = 38,990,613.65
  5. Step 5: Solve for x
    x = 38,990,613.65/7,223.45
  6. Step 6: Final answer
    x = 5,397.79

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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.