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Finding the Fourth Proportional to 7,220.06, 9,963.72 and 3,908.06

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Solution

The fourth proportional to 7,220.06, 9,963.72 and 3,908.06 is: 5,393.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,220.06 : 9,963.72 = 3,908.06 : x
  2. Step 2: Convert to fraction form
    7,220.06/9,963.72 = 3,908.06/x
  3. Step 3: Cross multiply
    7,220.06x = 9,963.72 × 3,908.06
  4. Step 4: Simplify right side
    7,220.06x = 38,938,815.58
  5. Step 5: Solve for x
    x = 38,938,815.58/7,220.06
  6. Step 6: Final answer
    x = 5,393.14

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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.