Home / 5,151.07-7,108.55-2,912.80

Finding the Fourth Proportional to 5,151.07, 7,108.55 and 2,912.80

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Solution

The fourth proportional to 5,151.07, 7,108.55 and 2,912.80 is: 4,019.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.07 : 7,108.55 = 2,912.80 : x
  2. Step 2: Convert to fraction form
    5,151.07/7,108.55 = 2,912.80/x
  3. Step 3: Cross multiply
    5,151.07x = 7,108.55 × 2,912.80
  4. Step 4: Simplify right side
    5,151.07x = 20,705,784.44
  5. Step 5: Solve for x
    x = 20,705,784.44/5,151.07
  6. Step 6: Final answer
    x = 4,019.71

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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.