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Finding the Fourth Proportional to 7,190.89, 9,921.49 and 4,207.46

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Solution

The fourth proportional to 7,190.89, 9,921.49 and 4,207.46 is: 5,805.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,190.89 : 9,921.49 = 4,207.46 : x
  2. Step 2: Convert to fraction form
    7,190.89/9,921.49 = 4,207.46/x
  3. Step 3: Cross multiply
    7,190.89x = 9,921.49 × 4,207.46
  4. Step 4: Simplify right side
    7,190.89x = 41,744,201.67
  5. Step 5: Solve for x
    x = 41,744,201.67/7,190.89
  6. Step 6: Final answer
    x = 5,805.15

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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.