Home / 11,005.20-16,513.20-5,160.78

Finding the Fourth Proportional to 11,005.20, 16,513.20 and 5,160.78

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Solution

The fourth proportional to 11,005.20, 16,513.20 and 5,160.78 is: 7,743.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,005.20 : 16,513.20 = 5,160.78 : x
  2. Step 2: Convert to fraction form
    11,005.20/16,513.20 = 5,160.78/x
  3. Step 3: Cross multiply
    11,005.20x = 16,513.20 × 5,160.78
  4. Step 4: Simplify right side
    11,005.20x = 85,220,992.30
  5. Step 5: Solve for x
    x = 85,220,992.30/11,005.20
  6. Step 6: Final answer
    x = 7,743.70

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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.