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Finding the Fourth Proportional to 7,207.76, 9,945.12 and 4,222.08

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Solution

The fourth proportional to 7,207.76, 9,945.12 and 4,222.08 is: 5,825.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,207.76 : 9,945.12 = 4,222.08 : x
  2. Step 2: Convert to fraction form
    7,207.76/9,945.12 = 4,222.08/x
  3. Step 3: Cross multiply
    7,207.76x = 9,945.12 × 4,222.08
  4. Step 4: Simplify right side
    7,207.76x = 41,989,092.25
  5. Step 5: Solve for x
    x = 41,989,092.25/7,207.76
  6. Step 6: Final answer
    x = 5,825.54

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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.