Home / 5,120.77-7,671.31-3,140.63

Finding the Fourth Proportional to 5,120.77, 7,671.31 and 3,140.63

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Solution

The fourth proportional to 5,120.77, 7,671.31 and 3,140.63 is: 4,704.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.77 : 7,671.31 = 3,140.63 : x
  2. Step 2: Convert to fraction form
    5,120.77/7,671.31 = 3,140.63/x
  3. Step 3: Cross multiply
    5,120.77x = 7,671.31 × 3,140.63
  4. Step 4: Simplify right side
    5,120.77x = 24,092,692.27
  5. Step 5: Solve for x
    x = 24,092,692.27/5,120.77
  6. Step 6: Final answer
    x = 4,704.90

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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.