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Finding the Fourth Proportional to 20,894.87, 28,815.32 and 16,660.01

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Solution

The fourth proportional to 20,894.87, 28,815.32 and 16,660.01 is: 22,975.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.87 : 28,815.32 = 16,660.01 : x
  2. Step 2: Convert to fraction form
    20,894.87/28,815.32 = 16,660.01/x
  3. Step 3: Cross multiply
    20,894.87x = 28,815.32 × 16,660.01
  4. Step 4: Simplify right side
    20,894.87x = 480,063,633.04
  5. Step 5: Solve for x
    x = 480,063,633.04/20,894.87
  6. Step 6: Final answer
    x = 22,975.19

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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.