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Finding the Fourth Proportional to 20,674.48, 28,520.76 and 12,285.04

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Solution

The fourth proportional to 20,674.48, 28,520.76 and 12,285.04 is: 16,947.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,674.48 : 28,520.76 = 12,285.04 : x
  2. Step 2: Convert to fraction form
    20,674.48/28,520.76 = 12,285.04/x
  3. Step 3: Cross multiply
    20,674.48x = 28,520.76 × 12,285.04
  4. Step 4: Simplify right side
    20,674.48x = 350,378,677.43
  5. Step 5: Solve for x
    x = 350,378,677.43/20,674.48
  6. Step 6: Final answer
    x = 16,947.40

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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.