Home / 2,921.87-4,398.68-2,620.50

Finding the Fourth Proportional to 2,921.87, 4,398.68 and 2,620.50

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Solution

The fourth proportional to 2,921.87, 4,398.68 and 2,620.50 is: 3,944.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.87 : 4,398.68 = 2,620.50 : x
  2. Step 2: Convert to fraction form
    2,921.87/4,398.68 = 2,620.50/x
  3. Step 3: Cross multiply
    2,921.87x = 4,398.68 × 2,620.50
  4. Step 4: Simplify right side
    2,921.87x = 11,526,727.84
  5. Step 5: Solve for x
    x = 11,526,727.84/2,921.87
  6. Step 6: Final answer
    x = 3,944.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.