Home / 20,636.44-28,478.12-11,204.80

Finding the Fourth Proportional to 20,636.44, 28,478.12 and 11,204.80

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Solution

The fourth proportional to 20,636.44, 28,478.12 and 11,204.80 is: 15,462.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.44 : 28,478.12 = 11,204.80 : x
  2. Step 2: Convert to fraction form
    20,636.44/28,478.12 = 11,204.80/x
  3. Step 3: Cross multiply
    20,636.44x = 28,478.12 × 11,204.80
  4. Step 4: Simplify right side
    20,636.44x = 319,091,638.98
  5. Step 5: Solve for x
    x = 319,091,638.98/20,636.44
  6. Step 6: Final answer
    x = 15,462.53

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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.