Home / 10,503.21-15,738.41-8,936.78

Finding the Fourth Proportional to 10,503.21, 15,738.41 and 8,936.78

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Solution

The fourth proportional to 10,503.21, 15,738.41 and 8,936.78 is: 13,391.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,503.21 : 15,738.41 = 8,936.78 : x
  2. Step 2: Convert to fraction form
    10,503.21/15,738.41 = 8,936.78/x
  3. Step 3: Cross multiply
    10,503.21x = 15,738.41 × 8,936.78
  4. Step 4: Simplify right side
    10,503.21x = 140,650,584.34
  5. Step 5: Solve for x
    x = 140,650,584.34/10,503.21
  6. Step 6: Final answer
    x = 13,391.20

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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.