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Finding the Fourth Proportional to 28,785, 43,107.84 and 13,957.20

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Solution

The fourth proportional to 28,785, 43,107.84 and 13,957.20 is: 20,902.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,785 : 43,107.84 = 13,957.20 : x
  2. Step 2: Convert to fraction form
    28,785/43,107.84 = 13,957.20/x
  3. Step 3: Cross multiply
    28,785x = 43,107.84 × 13,957.20
  4. Step 4: Simplify right side
    28,785x = 601,664,744.45
  5. Step 5: Solve for x
    x = 601,664,744.45/28,785
  6. Step 6: Final answer
    x = 20,902.02

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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.