Home / 3,921.44-5,878.40-1,971.76

Finding the Fourth Proportional to 3,921.44, 5,878.40 and 1,971.76

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Solution

The fourth proportional to 3,921.44, 5,878.40 and 1,971.76 is: 2,955.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.44 : 5,878.40 = 1,971.76 : x
  2. Step 2: Convert to fraction form
    3,921.44/5,878.40 = 1,971.76/x
  3. Step 3: Cross multiply
    3,921.44x = 5,878.40 × 1,971.76
  4. Step 4: Simplify right side
    3,921.44x = 11,590,793.98
  5. Step 5: Solve for x
    x = 11,590,793.98/3,921.44
  6. Step 6: Final answer
    x = 2,955.75

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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.