Home / 10,121.89-15,185.25-3,196.39

Finding the Fourth Proportional to 10,121.89, 15,185.25 and 3,196.39

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Solution

The fourth proportional to 10,121.89, 15,185.25 and 3,196.39 is: 4,795.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,121.89 : 15,185.25 = 3,196.39 : x
  2. Step 2: Convert to fraction form
    10,121.89/15,185.25 = 3,196.39/x
  3. Step 3: Cross multiply
    10,121.89x = 15,185.25 × 3,196.39
  4. Step 4: Simplify right side
    10,121.89x = 48,537,981.25
  5. Step 5: Solve for x
    x = 48,537,981.25/10,121.89
  6. Step 6: Final answer
    x = 4,795.35

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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.