Home / 2,134.27-2,943.49-1,387.65

Finding the Fourth Proportional to 2,134.27, 2,943.49 and 1,387.65

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Solution

The fourth proportional to 2,134.27, 2,943.49 and 1,387.65 is: 1,913.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,134.27 : 2,943.49 = 1,387.65 : x
  2. Step 2: Convert to fraction form
    2,134.27/2,943.49 = 1,387.65/x
  3. Step 3: Cross multiply
    2,134.27x = 2,943.49 × 1,387.65
  4. Step 4: Simplify right side
    2,134.27x = 4,084,533.90
  5. Step 5: Solve for x
    x = 4,084,533.90/2,134.27
  6. Step 6: Final answer
    x = 1,913.78

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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.