Home / 7,122.09-10,687.05-2,679.60

Finding the Fourth Proportional to 7,122.09, 10,687.05 and 2,679.60

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Solution

The fourth proportional to 7,122.09, 10,687.05 and 2,679.60 is: 4,020.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.09 : 10,687.05 = 2,679.60 : x
  2. Step 2: Convert to fraction form
    7,122.09/10,687.05 = 2,679.60/x
  3. Step 3: Cross multiply
    7,122.09x = 10,687.05 × 2,679.60
  4. Step 4: Simplify right side
    7,122.09x = 28,637,019.18
  5. Step 5: Solve for x
    x = 28,637,019.18/7,122.09
  6. Step 6: Final answer
    x = 4,020.87

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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.