Home / 20,808.72-28,709-11,849.87

Finding the Fourth Proportional to 20,808.72, 28,709 and 11,849.87

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Solution

The fourth proportional to 20,808.72, 28,709 and 11,849.87 is: 16,348.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.72 : 28,709 = 11,849.87 : x
  2. Step 2: Convert to fraction form
    20,808.72/28,709 = 11,849.87/x
  3. Step 3: Cross multiply
    20,808.72x = 28,709 × 11,849.87
  4. Step 4: Simplify right side
    20,808.72x = 340,197,917.83
  5. Step 5: Solve for x
    x = 340,197,917.83/20,808.72
  6. Step 6: Final answer
    x = 16,348.82

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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.