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Finding the Fourth Proportional to 7,216.70, 9,958.95 and 4,072.91

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Solution

The fourth proportional to 7,216.70, 9,958.95 and 4,072.91 is: 5,620.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,216.70 : 9,958.95 = 4,072.91 : x
  2. Step 2: Convert to fraction form
    7,216.70/9,958.95 = 4,072.91/x
  3. Step 3: Cross multiply
    7,216.70x = 9,958.95 × 4,072.91
  4. Step 4: Simplify right side
    7,216.70x = 40,561,857.25
  5. Step 5: Solve for x
    x = 40,561,857.25/7,216.70
  6. Step 6: Final answer
    x = 5,620.56

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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.