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Finding the Fourth Proportional to 28,874.40, 43,311.60 and 16,389.60

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Solution

The fourth proportional to 28,874.40, 43,311.60 and 16,389.60 is: 24,584.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,874.40 : 43,311.60 = 16,389.60 : x
  2. Step 2: Convert to fraction form
    28,874.40/43,311.60 = 16,389.60/x
  3. Step 3: Cross multiply
    28,874.40x = 43,311.60 × 16,389.60
  4. Step 4: Simplify right side
    28,874.40x = 709,859,799.36
  5. Step 5: Solve for x
    x = 709,859,799.36/28,874.40
  6. Step 6: Final answer
    x = 24,584.40

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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.