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Finding the Fourth Proportional to 7,221.33, 9,971.07 and 5,540.07

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Solution

The fourth proportional to 7,221.33, 9,971.07 and 5,540.07 is: 7,649.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.33 : 9,971.07 = 5,540.07 : x
  2. Step 2: Convert to fraction form
    7,221.33/9,971.07 = 5,540.07/x
  3. Step 3: Cross multiply
    7,221.33x = 9,971.07 × 5,540.07
  4. Step 4: Simplify right side
    7,221.33x = 55,240,425.77
  5. Step 5: Solve for x
    x = 55,240,425.77/7,221.33
  6. Step 6: Final answer
    x = 7,649.62

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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.