Home / 3,611.10-5,413.50-1,421.40

Finding the Fourth Proportional to 3,611.10, 5,413.50 and 1,421.40

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Solution

The fourth proportional to 3,611.10, 5,413.50 and 1,421.40 is: 2,130.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.10 : 5,413.50 = 1,421.40 : x
  2. Step 2: Convert to fraction form
    3,611.10/5,413.50 = 1,421.40/x
  3. Step 3: Cross multiply
    3,611.10x = 5,413.50 × 1,421.40
  4. Step 4: Simplify right side
    3,611.10x = 7,694,748.90
  5. Step 5: Solve for x
    x = 7,694,748.90/3,611.10
  6. Step 6: Final answer
    x = 2,130.86

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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.