Home / 20,910.72-28,856.82-11,479.32

Finding the Fourth Proportional to 20,910.72, 28,856.82 and 11,479.32

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Solution

The fourth proportional to 20,910.72, 28,856.82 and 11,479.32 is: 15,841.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.72 : 28,856.82 = 11,479.32 : x
  2. Step 2: Convert to fraction form
    20,910.72/28,856.82 = 11,479.32/x
  3. Step 3: Cross multiply
    20,910.72x = 28,856.82 × 11,479.32
  4. Step 4: Simplify right side
    20,910.72x = 331,256,670.96
  5. Step 5: Solve for x
    x = 331,256,670.96/20,910.72
  6. Step 6: Final answer
    x = 15,841.48

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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.