Home / 3,990.09-5,984.85-1,357.38

Finding the Fourth Proportional to 3,990.09, 5,984.85 and 1,357.38

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Solution

The fourth proportional to 3,990.09, 5,984.85 and 1,357.38 is: 2,035.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.09 : 5,984.85 = 1,357.38 : x
  2. Step 2: Convert to fraction form
    3,990.09/5,984.85 = 1,357.38/x
  3. Step 3: Cross multiply
    3,990.09x = 5,984.85 × 1,357.38
  4. Step 4: Simplify right side
    3,990.09x = 8,123,715.69
  5. Step 5: Solve for x
    x = 8,123,715.69/3,990.09
  6. Step 6: Final answer
    x = 2,035.97

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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.