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Finding the Fourth Proportional to 7,198.70, 9,934.54 and 4,215.49

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Solution

The fourth proportional to 7,198.70, 9,934.54 and 4,215.49 is: 5,817.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,198.70 : 9,934.54 = 4,215.49 : x
  2. Step 2: Convert to fraction form
    7,198.70/9,934.54 = 4,215.49/x
  3. Step 3: Cross multiply
    7,198.70x = 9,934.54 × 4,215.49
  4. Step 4: Simplify right side
    7,198.70x = 41,878,978.86
  5. Step 5: Solve for x
    x = 41,878,978.86/7,198.70
  6. Step 6: Final answer
    x = 5,817.58

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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.