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Finding the Fourth Proportional to 5,161.70, 7,122.94 and 2,923.70

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Solution

The fourth proportional to 5,161.70, 7,122.94 and 2,923.70 is: 4,034.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,161.70 : 7,122.94 = 2,923.70 : x
  2. Step 2: Convert to fraction form
    5,161.70/7,122.94 = 2,923.70/x
  3. Step 3: Cross multiply
    5,161.70x = 7,122.94 × 2,923.70
  4. Step 4: Simplify right side
    5,161.70x = 20,825,296.75
  5. Step 5: Solve for x
    x = 20,825,296.75/5,161.70
  6. Step 6: Final answer
    x = 4,034.58

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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.