Home / 7,121.12-10,681.07-2,190.65

Finding the Fourth Proportional to 7,121.12, 10,681.07 and 2,190.65

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Solution

The fourth proportional to 7,121.12, 10,681.07 and 2,190.65 is: 3,285.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.12 : 10,681.07 = 2,190.65 : x
  2. Step 2: Convert to fraction form
    7,121.12/10,681.07 = 2,190.65/x
  3. Step 3: Cross multiply
    7,121.12x = 10,681.07 × 2,190.65
  4. Step 4: Simplify right side
    7,121.12x = 23,398,421.64
  5. Step 5: Solve for x
    x = 23,398,421.64/7,121.12
  6. Step 6: Final answer
    x = 3,285.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.