Home / 20,636.24-28,478.32-11,204.80

Finding the Fourth Proportional to 20,636.24, 28,478.32 and 11,204.80

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Solution

The fourth proportional to 20,636.24, 28,478.32 and 11,204.80 is: 15,462.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.24 : 28,478.32 = 11,204.80 : x
  2. Step 2: Convert to fraction form
    20,636.24/28,478.32 = 11,204.80/x
  3. Step 3: Cross multiply
    20,636.24x = 28,478.32 × 11,204.80
  4. Step 4: Simplify right side
    20,636.24x = 319,093,780.73
  5. Step 5: Solve for x
    x = 319,093,780.73/20,636.24
  6. Step 6: Final answer
    x = 15,462.79

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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.