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Finding the Fourth Proportional to 20,594.92, 28,420.98 and 11,163.40

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Solution

The fourth proportional to 20,594.92, 28,420.98 and 11,163.40 is: 15,405.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,594.92 : 28,420.98 = 11,163.40 : x
  2. Step 2: Convert to fraction form
    20,594.92/28,420.98 = 11,163.40/x
  3. Step 3: Cross multiply
    20,594.92x = 28,420.98 × 11,163.40
  4. Step 4: Simplify right side
    20,594.92x = 317,274,768.13
  5. Step 5: Solve for x
    x = 317,274,768.13/20,594.92
  6. Step 6: Final answer
    x = 15,405.49

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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.