Home / 5,172.80-7,755.86-2,213.18

Finding the Fourth Proportional to 5,172.80, 7,755.86 and 2,213.18

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Solution

The fourth proportional to 5,172.80, 7,755.86 and 2,213.18 is: 3,318.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.80 : 7,755.86 = 2,213.18 : x
  2. Step 2: Convert to fraction form
    5,172.80/7,755.86 = 2,213.18/x
  3. Step 3: Cross multiply
    5,172.80x = 7,755.86 × 2,213.18
  4. Step 4: Simplify right side
    5,172.80x = 17,165,080.99
  5. Step 5: Solve for x
    x = 17,165,080.99/5,172.80
  6. Step 6: Final answer
    x = 3,318.33

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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.