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Finding the Fourth Proportional to 7,222.28, 9,966.75 and 3,910.28

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Solution

The fourth proportional to 7,222.28, 9,966.75 and 3,910.28 is: 5,396.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,222.28 : 9,966.75 = 3,910.28 : x
  2. Step 2: Convert to fraction form
    7,222.28/9,966.75 = 3,910.28/x
  3. Step 3: Cross multiply
    7,222.28x = 9,966.75 × 3,910.28
  4. Step 4: Simplify right side
    7,222.28x = 38,972,783.19
  5. Step 5: Solve for x
    x = 38,972,783.19/7,222.28
  6. Step 6: Final answer
    x = 5,396.19

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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.