Home / 11,138.70-15,355.13-8,481.50

Finding the Fourth Proportional to 11,138.70, 15,355.13 and 8,481.50

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Solution

The fourth proportional to 11,138.70, 15,355.13 and 8,481.50 is: 11,692.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,138.70 : 15,355.13 = 8,481.50 : x
  2. Step 2: Convert to fraction form
    11,138.70/15,355.13 = 8,481.50/x
  3. Step 3: Cross multiply
    11,138.70x = 15,355.13 × 8,481.50
  4. Step 4: Simplify right side
    11,138.70x = 130,234,535.10
  5. Step 5: Solve for x
    x = 130,234,535.10/11,138.70
  6. Step 6: Final answer
    x = 11,692.08

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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.