Home / 3,921.90-5,412.41-2,153.67

Finding the Fourth Proportional to 3,921.90, 5,412.41 and 2,153.67

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Solution

The fourth proportional to 3,921.90, 5,412.41 and 2,153.67 is: 2,972.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.90 : 5,412.41 = 2,153.67 : x
  2. Step 2: Convert to fraction form
    3,921.90/5,412.41 = 2,153.67/x
  3. Step 3: Cross multiply
    3,921.90x = 5,412.41 × 2,153.67
  4. Step 4: Simplify right side
    3,921.90x = 11,656,534.28
  5. Step 5: Solve for x
    x = 11,656,534.28/3,921.90
  6. Step 6: Final answer
    x = 2,972.17

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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.