Home / 3,891.86-5,371.91-2,214.20

Finding the Fourth Proportional to 3,891.86, 5,371.91 and 2,214.20

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Solution

The fourth proportional to 3,891.86, 5,371.91 and 2,214.20 is: 3,056.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.86 : 5,371.91 = 2,214.20 : x
  2. Step 2: Convert to fraction form
    3,891.86/5,371.91 = 2,214.20/x
  3. Step 3: Cross multiply
    3,891.86x = 5,371.91 × 2,214.20
  4. Step 4: Simplify right side
    3,891.86x = 11,894,477.48
  5. Step 5: Solve for x
    x = 11,894,477.48/3,891.86
  6. Step 6: Final answer
    x = 3,056.25

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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.