Home / 2,134.13-2,943.20-1,387.38

Finding the Fourth Proportional to 2,134.13, 2,943.20 and 1,387.38

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Solution

The fourth proportional to 2,134.13, 2,943.20 and 1,387.38 is: 1,913.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,134.13 : 2,943.20 = 1,387.38 : x
  2. Step 2: Convert to fraction form
    2,134.13/2,943.20 = 1,387.38/x
  3. Step 3: Cross multiply
    2,134.13x = 2,943.20 × 1,387.38
  4. Step 4: Simplify right side
    2,134.13x = 4,083,329.88
  5. Step 5: Solve for x
    x = 4,083,329.88/2,134.13
  6. Step 6: Final answer
    x = 1,913.35

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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.