Home / 3,146.60-4,331.94-2,678.12

Finding the Fourth Proportional to 3,146.60, 4,331.94 and 2,678.12

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Solution

The fourth proportional to 3,146.60, 4,331.94 and 2,678.12 is: 3,686.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,146.60 : 4,331.94 = 2,678.12 : x
  2. Step 2: Convert to fraction form
    3,146.60/4,331.94 = 2,678.12/x
  3. Step 3: Cross multiply
    3,146.60x = 4,331.94 × 2,678.12
  4. Step 4: Simplify right side
    3,146.60x = 11,601,455.15
  5. Step 5: Solve for x
    x = 11,601,455.15/3,146.60
  6. Step 6: Final answer
    x = 3,686.98

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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.