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Finding the Fourth Proportional to 7,212.92, 9,953.84 and 4,069.12

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Solution

The fourth proportional to 7,212.92, 9,953.84 and 4,069.12 is: 5,615.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212.92 : 9,953.84 = 4,069.12 : x
  2. Step 2: Convert to fraction form
    7,212.92/9,953.84 = 4,069.12/x
  3. Step 3: Cross multiply
    7,212.92x = 9,953.84 × 4,069.12
  4. Step 4: Simplify right side
    7,212.92x = 40,503,369.42
  5. Step 5: Solve for x
    x = 40,503,369.42/7,212.92
  6. Step 6: Final answer
    x = 5,615.39

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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.