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Finding the Fourth Proportional to 20,319.73, 27,978.92 and 17,787.67

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Solution

The fourth proportional to 20,319.73, 27,978.92 and 17,787.67 is: 24,492.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.73 : 27,978.92 = 17,787.67 : x
  2. Step 2: Convert to fraction form
    20,319.73/27,978.92 = 17,787.67/x
  3. Step 3: Cross multiply
    20,319.73x = 27,978.92 × 17,787.67
  4. Step 4: Simplify right side
    20,319.73x = 497,679,703.73
  5. Step 5: Solve for x
    x = 497,679,703.73/20,319.73
  6. Step 6: Final answer
    x = 24,492.44

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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.