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Finding the Fourth Proportional to 7,212.42, 9,955.62 and 4,229.22

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Solution

The fourth proportional to 7,212.42, 9,955.62 and 4,229.22 is: 5,837.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212.42 : 9,955.62 = 4,229.22 : x
  2. Step 2: Convert to fraction form
    7,212.42/9,955.62 = 4,229.22/x
  3. Step 3: Cross multiply
    7,212.42x = 9,955.62 × 4,229.22
  4. Step 4: Simplify right side
    7,212.42x = 42,104,507.22
  5. Step 5: Solve for x
    x = 42,104,507.22/7,212.42
  6. Step 6: Final answer
    x = 5,837.78

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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.