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Finding the Fourth Proportional to 11,149.75, 15,390.30 and 8,015.05

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Solution

The fourth proportional to 11,149.75, 15,390.30 and 8,015.05 is: 11,063.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,149.75 : 15,390.30 = 8,015.05 : x
  2. Step 2: Convert to fraction form
    11,149.75/15,390.30 = 8,015.05/x
  3. Step 3: Cross multiply
    11,149.75x = 15,390.30 × 8,015.05
  4. Step 4: Simplify right side
    11,149.75x = 123,354,024.02
  5. Step 5: Solve for x
    x = 123,354,024.02/11,149.75
  6. Step 6: Final answer
    x = 11,063.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.