Home / 20,529.43-28,330-11,455.03

Finding the Fourth Proportional to 20,529.43, 28,330 and 11,455.03

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Solution

The fourth proportional to 20,529.43, 28,330 and 11,455.03 is: 15,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,529.43 : 28,330 = 11,455.03 : x
  2. Step 2: Convert to fraction form
    20,529.43/28,330 = 11,455.03/x
  3. Step 3: Cross multiply
    20,529.43x = 28,330 × 11,455.03
  4. Step 4: Simplify right side
    20,529.43x = 324,520,999.90
  5. Step 5: Solve for x
    x = 324,520,999.90/20,529.43
  6. Step 6: Final answer
    x = 15,807.60

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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.