Home / 5,141.40-7,720.20-3,910.20

Finding the Fourth Proportional to 5,141.40, 7,720.20 and 3,910.20

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Solution

The fourth proportional to 5,141.40, 7,720.20 and 3,910.20 is: 5,871.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,141.40 : 7,720.20 = 3,910.20 : x
  2. Step 2: Convert to fraction form
    5,141.40/7,720.20 = 3,910.20/x
  3. Step 3: Cross multiply
    5,141.40x = 7,720.20 × 3,910.20
  4. Step 4: Simplify right side
    5,141.40x = 30,187,526.04
  5. Step 5: Solve for x
    x = 30,187,526.04/5,141.40
  6. Step 6: Final answer
    x = 5,871.46

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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.