Home / 3,886.45-5,363.42-2,118.17

Finding the Fourth Proportional to 3,886.45, 5,363.42 and 2,118.17

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Solution

The fourth proportional to 3,886.45, 5,363.42 and 2,118.17 is: 2,923.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,886.45 : 5,363.42 = 2,118.17 : x
  2. Step 2: Convert to fraction form
    3,886.45/5,363.42 = 2,118.17/x
  3. Step 3: Cross multiply
    3,886.45x = 5,363.42 × 2,118.17
  4. Step 4: Simplify right side
    3,886.45x = 11,360,638.16
  5. Step 5: Solve for x
    x = 11,360,638.16/3,886.45
  6. Step 6: Final answer
    x = 2,923.14

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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.