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Finding the Fourth Proportional to 20,352.76, 28,089.30 and 12,396.14

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Solution

The fourth proportional to 20,352.76, 28,089.30 and 12,396.14 is: 17,108.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,352.76 : 28,089.30 = 12,396.14 : x
  2. Step 2: Convert to fraction form
    20,352.76/28,089.30 = 12,396.14/x
  3. Step 3: Cross multiply
    20,352.76x = 28,089.30 × 12,396.14
  4. Step 4: Simplify right side
    20,352.76x = 348,198,895.30
  5. Step 5: Solve for x
    x = 348,198,895.30/20,352.76
  6. Step 6: Final answer
    x = 17,108.19

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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.