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Finding the Fourth Proportional to 18,774.30, 25,909.11 and 10,818.12

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Solution

The fourth proportional to 18,774.30, 25,909.11 and 10,818.12 is: 14,929.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.30 : 25,909.11 = 10,818.12 : x
  2. Step 2: Convert to fraction form
    18,774.30/25,909.11 = 10,818.12/x
  3. Step 3: Cross multiply
    18,774.30x = 25,909.11 × 10,818.12
  4. Step 4: Simplify right side
    18,774.30x = 280,287,861.07
  5. Step 5: Solve for x
    x = 280,287,861.07/18,774.30
  6. Step 6: Final answer
    x = 14,929.34

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.