Home / 3,931.26-5,889.60-1,978.74

Finding the Fourth Proportional to 3,931.26, 5,889.60 and 1,978.74

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Solution

The fourth proportional to 3,931.26, 5,889.60 and 1,978.74 is: 2,964.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.26 : 5,889.60 = 1,978.74 : x
  2. Step 2: Convert to fraction form
    3,931.26/5,889.60 = 1,978.74/x
  3. Step 3: Cross multiply
    3,931.26x = 5,889.60 × 1,978.74
  4. Step 4: Simplify right side
    3,931.26x = 11,653,987.10
  5. Step 5: Solve for x
    x = 11,653,987.10/3,931.26
  6. Step 6: Final answer
    x = 2,964.44

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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.