Home / 20,645.32-28,490.66-11,213.96

Finding the Fourth Proportional to 20,645.32, 28,490.66 and 11,213.96

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Solution

The fourth proportional to 20,645.32, 28,490.66 and 11,213.96 is: 15,475.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.32 : 28,490.66 = 11,213.96 : x
  2. Step 2: Convert to fraction form
    20,645.32/28,490.66 = 11,213.96/x
  3. Step 3: Cross multiply
    20,645.32x = 28,490.66 × 11,213.96
  4. Step 4: Simplify right side
    20,645.32x = 319,493,121.61
  5. Step 5: Solve for x
    x = 319,493,121.61/20,645.32
  6. Step 6: Final answer
    x = 15,475.33

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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.