Home / 11,137.70-15,353.75-8,480.50

Finding the Fourth Proportional to 11,137.70, 15,353.75 and 8,480.50

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Solution

The fourth proportional to 11,137.70, 15,353.75 and 8,480.50 is: 11,690.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,137.70 : 15,353.75 = 8,480.50 : x
  2. Step 2: Convert to fraction form
    11,137.70/15,353.75 = 8,480.50/x
  3. Step 3: Cross multiply
    11,137.70x = 15,353.75 × 8,480.50
  4. Step 4: Simplify right side
    11,137.70x = 130,207,459.69
  5. Step 5: Solve for x
    x = 130,207,459.69/11,137.70
  6. Step 6: Final answer
    x = 11,690.69

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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.