Home / 3,121.02-4,297.14-2,647.89

Finding the Fourth Proportional to 3,121.02, 4,297.14 and 2,647.89

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Solution

The fourth proportional to 3,121.02, 4,297.14 and 2,647.89 is: 3,645.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.02 : 4,297.14 = 2,647.89 : x
  2. Step 2: Convert to fraction form
    3,121.02/4,297.14 = 2,647.89/x
  3. Step 3: Cross multiply
    3,121.02x = 4,297.14 × 2,647.89
  4. Step 4: Simplify right side
    3,121.02x = 11,378,354.03
  5. Step 5: Solve for x
    x = 11,378,354.03/3,121.02
  6. Step 6: Final answer
    x = 3,645.72

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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.