Home / 7,921.64-11,878.41-2,654.75

Finding the Fourth Proportional to 7,921.64, 11,878.41 and 2,654.75

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Solution

The fourth proportional to 7,921.64, 11,878.41 and 2,654.75 is: 3,980.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.64 : 11,878.41 = 2,654.75 : x
  2. Step 2: Convert to fraction form
    7,921.64/11,878.41 = 2,654.75/x
  3. Step 3: Cross multiply
    7,921.64x = 11,878.41 × 2,654.75
  4. Step 4: Simplify right side
    7,921.64x = 31,534,149.56
  5. Step 5: Solve for x
    x = 31,534,149.56/7,921.64
  6. Step 6: Final answer
    x = 3,980.76

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1.5x scale

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.