Home / 10,084.57-15,129.20-3,420.72

Finding the Fourth Proportional to 10,084.57, 15,129.20 and 3,420.72

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Solution

The fourth proportional to 10,084.57, 15,129.20 and 3,420.72 is: 5,131.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,084.57 : 15,129.20 = 3,420.72 : x
  2. Step 2: Convert to fraction form
    10,084.57/15,129.20 = 3,420.72/x
  3. Step 3: Cross multiply
    10,084.57x = 15,129.20 × 3,420.72
  4. Step 4: Simplify right side
    10,084.57x = 51,752,664.27
  5. Step 5: Solve for x
    x = 51,752,664.27/10,084.57
  6. Step 6: Final answer
    x = 5,131.86

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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.