Home / 2,145.28-2,961.28-1,923.84

Finding the Fourth Proportional to 2,145.28, 2,961.28 and 1,923.84

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Solution

The fourth proportional to 2,145.28, 2,961.28 and 1,923.84 is: 2,655.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.28 : 2,961.28 = 1,923.84 : x
  2. Step 2: Convert to fraction form
    2,145.28/2,961.28 = 1,923.84/x
  3. Step 3: Cross multiply
    2,145.28x = 2,961.28 × 1,923.84
  4. Step 4: Simplify right side
    2,145.28x = 5,697,028.92
  5. Step 5: Solve for x
    x = 5,697,028.92/2,145.28
  6. Step 6: Final answer
    x = 2,655.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.