Home / 20,784.45-28,679.39-11,708.52

Finding the Fourth Proportional to 20,784.45, 28,679.39 and 11,708.52

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Solution

The fourth proportional to 20,784.45, 28,679.39 and 11,708.52 is: 16,155.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.45 : 28,679.39 = 11,708.52 : x
  2. Step 2: Convert to fraction form
    20,784.45/28,679.39 = 11,708.52/x
  3. Step 3: Cross multiply
    20,784.45x = 28,679.39 × 11,708.52
  4. Step 4: Simplify right side
    20,784.45x = 335,793,122.15
  5. Step 5: Solve for x
    x = 335,793,122.15/20,784.45
  6. Step 6: Final answer
    x = 16,155.98

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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.