Home / 3,138.77-4,704.70-1,381.91

Finding the Fourth Proportional to 3,138.77, 4,704.70 and 1,381.91

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Solution

The fourth proportional to 3,138.77, 4,704.70 and 1,381.91 is: 2,071.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.77 : 4,704.70 = 1,381.91 : x
  2. Step 2: Convert to fraction form
    3,138.77/4,704.70 = 1,381.91/x
  3. Step 3: Cross multiply
    3,138.77x = 4,704.70 × 1,381.91
  4. Step 4: Simplify right side
    3,138.77x = 6,501,472.60
  5. Step 5: Solve for x
    x = 6,501,472.60/3,138.77
  6. Step 6: Final answer
    x = 2,071.34

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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.