Home / 3,851.56-5,314.78-2,172.77

Finding the Fourth Proportional to 3,851.56, 5,314.78 and 2,172.77

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Solution

The fourth proportional to 3,851.56, 5,314.78 and 2,172.77 is: 2,998.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.56 : 5,314.78 = 2,172.77 : x
  2. Step 2: Convert to fraction form
    3,851.56/5,314.78 = 2,172.77/x
  3. Step 3: Cross multiply
    3,851.56x = 5,314.78 × 2,172.77
  4. Step 4: Simplify right side
    3,851.56x = 11,547,794.54
  5. Step 5: Solve for x
    x = 11,547,794.54/3,851.56
  6. Step 6: Final answer
    x = 2,998.21

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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.