Home / 3,921.29-5,412.15-2,220.10

Finding the Fourth Proportional to 3,921.29, 5,412.15 and 2,220.10

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Solution

The fourth proportional to 3,921.29, 5,412.15 and 2,220.10 is: 3,064.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.29 : 5,412.15 = 2,220.10 : x
  2. Step 2: Convert to fraction form
    3,921.29/5,412.15 = 2,220.10/x
  3. Step 3: Cross multiply
    3,921.29x = 5,412.15 × 2,220.10
  4. Step 4: Simplify right side
    3,921.29x = 12,015,500.68
  5. Step 5: Solve for x
    x = 12,015,500.68/3,921.29
  6. Step 6: Final answer
    x = 3,064.17

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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.