Home / 20,650.56-28,497-11,218.80

Finding the Fourth Proportional to 20,650.56, 28,497 and 11,218.80

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Solution

The fourth proportional to 20,650.56, 28,497 and 11,218.80 is: 15,481.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,650.56 : 28,497 = 11,218.80 : x
  2. Step 2: Convert to fraction form
    20,650.56/28,497 = 11,218.80/x
  3. Step 3: Cross multiply
    20,650.56x = 28,497 × 11,218.80
  4. Step 4: Simplify right side
    20,650.56x = 319,702,143.60
  5. Step 5: Solve for x
    x = 319,702,143.60/20,650.56
  6. Step 6: Final answer
    x = 15,481.52

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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.