Home / 2,181.88-3,011.38-1,395.72

Finding the Fourth Proportional to 2,181.88, 3,011.38 and 1,395.72

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Solution

The fourth proportional to 2,181.88, 3,011.38 and 1,395.72 is: 1,926.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.88 : 3,011.38 = 1,395.72 : x
  2. Step 2: Convert to fraction form
    2,181.88/3,011.38 = 1,395.72/x
  3. Step 3: Cross multiply
    2,181.88x = 3,011.38 × 1,395.72
  4. Step 4: Simplify right side
    2,181.88x = 4,203,043.29
  5. Step 5: Solve for x
    x = 4,203,043.29/2,181.88
  6. Step 6: Final answer
    x = 1,926.34

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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.