Home / 5,209.89-7,191.15-2,972.98

Finding the Fourth Proportional to 5,209.89, 7,191.15 and 2,972.98

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Solution

The fourth proportional to 5,209.89, 7,191.15 and 2,972.98 is: 4,103.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,209.89 : 7,191.15 = 2,972.98 : x
  2. Step 2: Convert to fraction form
    5,209.89/7,191.15 = 2,972.98/x
  3. Step 3: Cross multiply
    5,209.89x = 7,191.15 × 2,972.98
  4. Step 4: Simplify right side
    5,209.89x = 21,379,145.13
  5. Step 5: Solve for x
    x = 21,379,145.13/5,209.89
  6. Step 6: Final answer
    x = 4,103.57

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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.