Home / 3,712.86-5,122.47-2,118.36

Finding the Fourth Proportional to 3,712.86, 5,122.47 and 2,118.36

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Solution

The fourth proportional to 3,712.86, 5,122.47 and 2,118.36 is: 2,922.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.86 : 5,122.47 = 2,118.36 : x
  2. Step 2: Convert to fraction form
    3,712.86/5,122.47 = 2,118.36/x
  3. Step 3: Cross multiply
    3,712.86x = 5,122.47 × 2,118.36
  4. Step 4: Simplify right side
    3,712.86x = 10,851,235.55
  5. Step 5: Solve for x
    x = 10,851,235.55/3,712.86
  6. Step 6: Final answer
    x = 2,922.61

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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.