Home / 4,172.80-5,715.68-4,161.28

Finding the Fourth Proportional to 4,172.80, 5,715.68 and 4,161.28

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Solution

The fourth proportional to 4,172.80, 5,715.68 and 4,161.28 is: 5,699.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,172.80 : 5,715.68 = 4,161.28 : x
  2. Step 2: Convert to fraction form
    4,172.80/5,715.68 = 4,161.28/x
  3. Step 3: Cross multiply
    4,172.80x = 5,715.68 × 4,161.28
  4. Step 4: Simplify right side
    4,172.80x = 23,784,544.87
  5. Step 5: Solve for x
    x = 23,784,544.87/4,172.80
  6. Step 6: Final answer
    x = 5,699.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.