Home / 5,115.22-7,057.70-3,921.40

Finding the Fourth Proportional to 5,115.22, 7,057.70 and 3,921.40

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Solution

The fourth proportional to 5,115.22, 7,057.70 and 3,921.40 is: 5,410.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.22 : 7,057.70 = 3,921.40 : x
  2. Step 2: Convert to fraction form
    5,115.22/7,057.70 = 3,921.40/x
  3. Step 3: Cross multiply
    5,115.22x = 7,057.70 × 3,921.40
  4. Step 4: Simplify right side
    5,115.22x = 27,676,029.49
  5. Step 5: Solve for x
    x = 27,676,029.49/5,115.22
  6. Step 6: Final answer
    x = 5,410.53

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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.