Home / 7,312.20-10,961.10-3,611.40

Finding the Fourth Proportional to 7,312.20, 10,961.10 and 3,611.40

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Solution

The fourth proportional to 7,312.20, 10,961.10 and 3,611.40 is: 5,413.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312.20 : 10,961.10 = 3,611.40 : x
  2. Step 2: Convert to fraction form
    7,312.20/10,961.10 = 3,611.40/x
  3. Step 3: Cross multiply
    7,312.20x = 10,961.10 × 3,611.40
  4. Step 4: Simplify right side
    7,312.20x = 39,584,916.54
  5. Step 5: Solve for x
    x = 39,584,916.54/7,312.20
  6. Step 6: Final answer
    x = 5,413.54

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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.