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Finding the Fourth Proportional to 28,797.11, 43,143.03 and 20,880.01

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Solution

The fourth proportional to 28,797.11, 43,143.03 and 20,880.01 is: 31,281.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,797.11 : 43,143.03 = 20,880.01 : x
  2. Step 2: Convert to fraction form
    28,797.11/43,143.03 = 20,880.01/x
  3. Step 3: Cross multiply
    28,797.11x = 43,143.03 × 20,880.01
  4. Step 4: Simplify right side
    28,797.11x = 900,826,951.76
  5. Step 5: Solve for x
    x = 900,826,951.76/28,797.11
  6. Step 6: Final answer
    x = 31,281.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.