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Finding the Fourth Proportional to 18,992.48, 28,492.32 and 7,893.14

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Solution

The fourth proportional to 18,992.48, 28,492.32 and 7,893.14 is: 11,841.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.48 : 28,492.32 = 7,893.14 : x
  2. Step 2: Convert to fraction form
    18,992.48/28,492.32 = 7,893.14/x
  3. Step 3: Cross multiply
    18,992.48x = 28,492.32 × 7,893.14
  4. Step 4: Simplify right side
    18,992.48x = 224,893,870.68
  5. Step 5: Solve for x
    x = 224,893,870.68/18,992.48
  6. Step 6: Final answer
    x = 11,841.21

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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.