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Finding the Fourth Proportional to 7,220.32, 9,964.07 and 3,908.32

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Solution

The fourth proportional to 7,220.32, 9,964.07 and 3,908.32 is: 5,393.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,220.32 : 9,964.07 = 3,908.32 : x
  2. Step 2: Convert to fraction form
    7,220.32/9,964.07 = 3,908.32/x
  3. Step 3: Cross multiply
    7,220.32x = 9,964.07 × 3,908.32
  4. Step 4: Simplify right side
    7,220.32x = 38,942,774.06
  5. Step 5: Solve for x
    x = 38,942,774.06/7,220.32
  6. Step 6: Final answer
    x = 5,393.50

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Half scale
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Double scale
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Similar ratio
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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.