Home / 3,989.50-5,975.12-1,910.95

Finding the Fourth Proportional to 3,989.50, 5,975.12 and 1,910.95

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Solution

The fourth proportional to 3,989.50, 5,975.12 and 1,910.95 is: 2,862.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.50 : 5,975.12 = 1,910.95 : x
  2. Step 2: Convert to fraction form
    3,989.50/5,975.12 = 1,910.95/x
  3. Step 3: Cross multiply
    3,989.50x = 5,975.12 × 1,910.95
  4. Step 4: Simplify right side
    3,989.50x = 11,418,145.40
  5. Step 5: Solve for x
    x = 11,418,145.40/3,989.50
  6. Step 6: Final answer
    x = 2,862.05

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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.