Home / 3,181.64-4,390.86-2,117.58

Finding the Fourth Proportional to 3,181.64, 4,390.86 and 2,117.58

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Solution

The fourth proportional to 3,181.64, 4,390.86 and 2,117.58 is: 2,922.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,181.64 : 4,390.86 = 2,117.58 : x
  2. Step 2: Convert to fraction form
    3,181.64/4,390.86 = 2,117.58/x
  3. Step 3: Cross multiply
    3,181.64x = 4,390.86 × 2,117.58
  4. Step 4: Simplify right side
    3,181.64x = 9,297,997.32
  5. Step 5: Solve for x
    x = 9,297,997.32/3,181.64
  6. Step 6: Final answer
    x = 2,922.39

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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.