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Finding the Fourth Proportional to 7,212.99, 9,953.91 and 4,069.16

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Solution

The fourth proportional to 7,212.99, 9,953.91 and 4,069.16 is: 5,615.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212.99 : 9,953.91 = 4,069.16 : x
  2. Step 2: Convert to fraction form
    7,212.99/9,953.91 = 4,069.16/x
  3. Step 3: Cross multiply
    7,212.99x = 9,953.91 × 4,069.16
  4. Step 4: Simplify right side
    7,212.99x = 40,504,002.65
  5. Step 5: Solve for x
    x = 40,504,002.65/7,212.99
  6. Step 6: Final answer
    x = 5,615.42

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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.