Home / 3,922.38-5,412.90-2,154.10

Finding the Fourth Proportional to 3,922.38, 5,412.90 and 2,154.10

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Solution

The fourth proportional to 3,922.38, 5,412.90 and 2,154.10 is: 2,972.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.38 : 5,412.90 = 2,154.10 : x
  2. Step 2: Convert to fraction form
    3,922.38/5,412.90 = 2,154.10/x
  3. Step 3: Cross multiply
    3,922.38x = 5,412.90 × 2,154.10
  4. Step 4: Simplify right side
    3,922.38x = 11,659,927.89
  5. Step 5: Solve for x
    x = 11,659,927.89/3,922.38
  6. Step 6: Final answer
    x = 2,972.67

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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.