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Finding the Fourth Proportional to 15,809.96, 21,805.80 and 11,029.88

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Solution

The fourth proportional to 15,809.96, 21,805.80 and 11,029.88 is: 15,212.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,809.96 : 21,805.80 = 11,029.88 : x
  2. Step 2: Convert to fraction form
    15,809.96/21,805.80 = 11,029.88/x
  3. Step 3: Cross multiply
    15,809.96x = 21,805.80 × 11,029.88
  4. Step 4: Simplify right side
    15,809.96x = 240,515,357.30
  5. Step 5: Solve for x
    x = 240,515,357.30/15,809.96
  6. Step 6: Final answer
    x = 15,212.90

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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.