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Finding the Fourth Proportional to 18,805.76, 28,208.56 and 11,063.84

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Solution

The fourth proportional to 18,805.76, 28,208.56 and 11,063.84 is: 16,595.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.76 : 28,208.56 = 11,063.84 : x
  2. Step 2: Convert to fraction form
    18,805.76/28,208.56 = 11,063.84/x
  3. Step 3: Cross multiply
    18,805.76x = 28,208.56 × 11,063.84
  4. Step 4: Simplify right side
    18,805.76x = 312,094,994.47
  5. Step 5: Solve for x
    x = 312,094,994.47/18,805.76
  6. Step 6: Final answer
    x = 16,595.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.