Home / 3,920.24-5,876.58-1,321.76

Finding the Fourth Proportional to 3,920.24, 5,876.58 and 1,321.76

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Solution

The fourth proportional to 3,920.24, 5,876.58 and 1,321.76 is: 1,981.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.24 : 5,876.58 = 1,321.76 : x
  2. Step 2: Convert to fraction form
    3,920.24/5,876.58 = 1,321.76/x
  3. Step 3: Cross multiply
    3,920.24x = 5,876.58 × 1,321.76
  4. Step 4: Simplify right side
    3,920.24x = 7,767,428.38
  5. Step 5: Solve for x
    x = 7,767,428.38/3,920.24
  6. Step 6: Final answer
    x = 1,981.37

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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.