Home / 3,989.52-5,984.58-1,391.76

Finding the Fourth Proportional to 3,989.52, 5,984.58 and 1,391.76

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Solution

The fourth proportional to 3,989.52, 5,984.58 and 1,391.76 is: 2,087.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.52 : 5,984.58 = 1,391.76 : x
  2. Step 2: Convert to fraction form
    3,989.52/5,984.58 = 1,391.76/x
  3. Step 3: Cross multiply
    3,989.52x = 5,984.58 × 1,391.76
  4. Step 4: Simplify right side
    3,989.52x = 8,329,099.06
  5. Step 5: Solve for x
    x = 8,329,099.06/3,989.52
  6. Step 6: Final answer
    x = 2,087.74

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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.