Home / 2,138.16-2,949.84-1,393.02

Finding the Fourth Proportional to 2,138.16, 2,949.84 and 1,393.02

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Solution

The fourth proportional to 2,138.16, 2,949.84 and 1,393.02 is: 1,921.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.16 : 2,949.84 = 1,393.02 : x
  2. Step 2: Convert to fraction form
    2,138.16/2,949.84 = 1,393.02/x
  3. Step 3: Cross multiply
    2,138.16x = 2,949.84 × 1,393.02
  4. Step 4: Simplify right side
    2,138.16x = 4,109,186.12
  5. Step 5: Solve for x
    x = 4,109,186.12/2,138.16
  6. Step 6: Final answer
    x = 1,921.83

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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.