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Finding the Fourth Proportional to 7,212.19, 9,952.82 and 3,900.19

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Solution

The fourth proportional to 7,212.19, 9,952.82 and 3,900.19 is: 5,382.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212.19 : 9,952.82 = 3,900.19 : x
  2. Step 2: Convert to fraction form
    7,212.19/9,952.82 = 3,900.19/x
  3. Step 3: Cross multiply
    7,212.19x = 9,952.82 × 3,900.19
  4. Step 4: Simplify right side
    7,212.19x = 38,817,889.04
  5. Step 5: Solve for x
    x = 38,817,889.04/7,212.19
  6. Step 6: Final answer
    x = 5,382.26

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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.