Home / 10,215.78-15,325.11-3,640.02

Finding the Fourth Proportional to 10,215.78, 15,325.11 and 3,640.02

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Solution

The fourth proportional to 10,215.78, 15,325.11 and 3,640.02 is: 5,460.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215.78 : 15,325.11 = 3,640.02 : x
  2. Step 2: Convert to fraction form
    10,215.78/15,325.11 = 3,640.02/x
  3. Step 3: Cross multiply
    10,215.78x = 15,325.11 × 3,640.02
  4. Step 4: Simplify right side
    10,215.78x = 55,783,706.90
  5. Step 5: Solve for x
    x = 55,783,706.90/10,215.78
  6. Step 6: Final answer
    x = 5,460.54

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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.