Home / 5,118.80-7,676.78-1,420.75

Finding the Fourth Proportional to 5,118.80, 7,676.78 and 1,420.75

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Solution

The fourth proportional to 5,118.80, 7,676.78 and 1,420.75 is: 2,130.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.80 : 7,676.78 = 1,420.75 : x
  2. Step 2: Convert to fraction form
    5,118.80/7,676.78 = 1,420.75/x
  3. Step 3: Cross multiply
    5,118.80x = 7,676.78 × 1,420.75
  4. Step 4: Simplify right side
    5,118.80x = 10,906,769.54
  5. Step 5: Solve for x
    x = 10,906,769.54/5,118.80
  6. Step 6: Final answer
    x = 2,130.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.