Home / 2,115.68-3,168.08-1,383.12

Finding the Fourth Proportional to 2,115.68, 3,168.08 and 1,383.12

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Solution

The fourth proportional to 2,115.68, 3,168.08 and 1,383.12 is: 2,071.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.68 : 3,168.08 = 1,383.12 : x
  2. Step 2: Convert to fraction form
    2,115.68/3,168.08 = 1,383.12/x
  3. Step 3: Cross multiply
    2,115.68x = 3,168.08 × 1,383.12
  4. Step 4: Simplify right side
    2,115.68x = 4,381,834.81
  5. Step 5: Solve for x
    x = 4,381,834.81/2,115.68
  6. Step 6: Final answer
    x = 2,071.12

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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.