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Finding the Fourth Proportional to 18,804.66, 28,213.82 and 7,117.88

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Solution

The fourth proportional to 18,804.66, 28,213.82 and 7,117.88 is: 10,679.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.66 : 28,213.82 = 7,117.88 : x
  2. Step 2: Convert to fraction form
    18,804.66/28,213.82 = 7,117.88/x
  3. Step 3: Cross multiply
    18,804.66x = 28,213.82 × 7,117.88
  4. Step 4: Simplify right side
    18,804.66x = 200,822,435.14
  5. Step 5: Solve for x
    x = 200,822,435.14/18,804.66
  6. Step 6: Final answer
    x = 10,679.40

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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.