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Finding the Fourth Proportional to 7,221.38, 9,961.82 and 4,707.70

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Solution

The fourth proportional to 7,221.38, 9,961.82 and 4,707.70 is: 6,494.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.38 : 9,961.82 = 4,707.70 : x
  2. Step 2: Convert to fraction form
    7,221.38/9,961.82 = 4,707.70/x
  3. Step 3: Cross multiply
    7,221.38x = 9,961.82 × 4,707.70
  4. Step 4: Simplify right side
    7,221.38x = 46,897,260.01
  5. Step 5: Solve for x
    x = 46,897,260.01/7,221.38
  6. Step 6: Final answer
    x = 6,494.22

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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.