Home / 2,691.42-4,038.95-1,393.80

Finding the Fourth Proportional to 2,691.42, 4,038.95 and 1,393.80

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Solution

The fourth proportional to 2,691.42, 4,038.95 and 1,393.80 is: 2,091.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,691.42 : 4,038.95 = 1,393.80 : x
  2. Step 2: Convert to fraction form
    2,691.42/4,038.95 = 1,393.80/x
  3. Step 3: Cross multiply
    2,691.42x = 4,038.95 × 1,393.80
  4. Step 4: Simplify right side
    2,691.42x = 5,629,488.51
  5. Step 5: Solve for x
    x = 5,629,488.51/2,691.42
  6. Step 6: Final answer
    x = 2,091.64

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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.