Home / 3,931.56-5,425.43-2,138.99

Finding the Fourth Proportional to 3,931.56, 5,425.43 and 2,138.99

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Solution

The fourth proportional to 3,931.56, 5,425.43 and 2,138.99 is: 2,951.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.56 : 5,425.43 = 2,138.99 : x
  2. Step 2: Convert to fraction form
    3,931.56/5,425.43 = 2,138.99/x
  3. Step 3: Cross multiply
    3,931.56x = 5,425.43 × 2,138.99
  4. Step 4: Simplify right side
    3,931.56x = 11,604,959.43
  5. Step 5: Solve for x
    x = 11,604,959.43/3,931.56
  6. Step 6: Final answer
    x = 2,951.74

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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.