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Finding the Fourth Proportional to 6,972.94, 9,622.39 and 3,988.70

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Solution

The fourth proportional to 6,972.94, 9,622.39 and 3,988.70 is: 5,504.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,972.94 : 9,622.39 = 3,988.70 : x
  2. Step 2: Convert to fraction form
    6,972.94/9,622.39 = 3,988.70/x
  3. Step 3: Cross multiply
    6,972.94x = 9,622.39 × 3,988.70
  4. Step 4: Simplify right side
    6,972.94x = 38,380,768.91
  5. Step 5: Solve for x
    x = 38,380,768.91/6,972.94
  6. Step 6: Final answer
    x = 5,504.25

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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.