Home / 5,172.85-7,138.93-3,156.09

Finding the Fourth Proportional to 5,172.85, 7,138.93 and 3,156.09

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Solution

The fourth proportional to 5,172.85, 7,138.93 and 3,156.09 is: 4,355.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.85 : 7,138.93 = 3,156.09 : x
  2. Step 2: Convert to fraction form
    5,172.85/7,138.93 = 3,156.09/x
  3. Step 3: Cross multiply
    5,172.85x = 7,138.93 × 3,156.09
  4. Step 4: Simplify right side
    5,172.85x = 22,531,105.58
  5. Step 5: Solve for x
    x = 22,531,105.58/5,172.85
  6. Step 6: Final answer
    x = 4,355.65

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1.5x scale

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.