Home / 3,981.86-5,977.40-2,136.57

Finding the Fourth Proportional to 3,981.86, 5,977.40 and 2,136.57

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Solution

The fourth proportional to 3,981.86, 5,977.40 and 2,136.57 is: 3,207.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.86 : 5,977.40 = 2,136.57 : x
  2. Step 2: Convert to fraction form
    3,981.86/5,977.40 = 2,136.57/x
  3. Step 3: Cross multiply
    3,981.86x = 5,977.40 × 2,136.57
  4. Step 4: Simplify right side
    3,981.86x = 12,771,154.33
  5. Step 5: Solve for x
    x = 12,771,154.33/3,981.86
  6. Step 6: Final answer
    x = 3,207.34

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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.