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Finding the Fourth Proportional to 18,684, 28,013.04 and 11,290.32

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Solution

The fourth proportional to 18,684, 28,013.04 and 11,290.32 is: 16,927.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,684 : 28,013.04 = 11,290.32 : x
  2. Step 2: Convert to fraction form
    18,684/28,013.04 = 11,290.32/x
  3. Step 3: Cross multiply
    18,684x = 28,013.04 × 11,290.32
  4. Step 4: Simplify right side
    18,684x = 316,276,185.77
  5. Step 5: Solve for x
    x = 316,276,185.77/18,684
  6. Step 6: Final answer
    x = 16,927.65

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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.