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Finding the Fourth Proportional to 11,003.70, 16,469.10 and 10,128.90

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Solution

The fourth proportional to 11,003.70, 16,469.10 and 10,128.90 is: 15,159.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,003.70 : 16,469.10 = 10,128.90 : x
  2. Step 2: Convert to fraction form
    11,003.70/16,469.10 = 10,128.90/x
  3. Step 3: Cross multiply
    11,003.70x = 16,469.10 × 10,128.90
  4. Step 4: Simplify right side
    11,003.70x = 166,813,866.99
  5. Step 5: Solve for x
    x = 166,813,866.99/11,003.70
  6. Step 6: Final answer
    x = 15,159.80

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1.5x scale

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.