Home / 3,931.88-5,893.50-1,981.40

Finding the Fourth Proportional to 3,931.88, 5,893.50 and 1,981.40

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Solution

The fourth proportional to 3,931.88, 5,893.50 and 1,981.40 is: 2,969.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.88 : 5,893.50 = 1,981.40 : x
  2. Step 2: Convert to fraction form
    3,931.88/5,893.50 = 1,981.40/x
  3. Step 3: Cross multiply
    3,931.88x = 5,893.50 × 1,981.40
  4. Step 4: Simplify right side
    3,931.88x = 11,677,380.90
  5. Step 5: Solve for x
    x = 11,677,380.90/3,931.88
  6. Step 6: Final answer
    x = 2,969.92

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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.