Home / 20,782.60-28,672.87-11,827.86

Finding the Fourth Proportional to 20,782.60, 28,672.87 and 11,827.86

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Solution

The fourth proportional to 20,782.60, 28,672.87 and 11,827.86 is: 16,318.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.60 : 28,672.87 = 11,827.86 : x
  2. Step 2: Convert to fraction form
    20,782.60/28,672.87 = 11,827.86/x
  3. Step 3: Cross multiply
    20,782.60x = 28,672.87 × 11,827.86
  4. Step 4: Simplify right side
    20,782.60x = 339,138,692.16
  5. Step 5: Solve for x
    x = 339,138,692.16/20,782.60
  6. Step 6: Final answer
    x = 16,318.40

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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.