Home / 20,661.62-28,513.24-12,276.50

Finding the Fourth Proportional to 20,661.62, 28,513.24 and 12,276.50

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Solution

The fourth proportional to 20,661.62, 28,513.24 and 12,276.50 is: 16,941.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.62 : 28,513.24 = 12,276.50 : x
  2. Step 2: Convert to fraction form
    20,661.62/28,513.24 = 12,276.50/x
  3. Step 3: Cross multiply
    20,661.62x = 28,513.24 × 12,276.50
  4. Step 4: Simplify right side
    20,661.62x = 350,042,790.86
  5. Step 5: Solve for x
    x = 350,042,790.86/20,661.62
  6. Step 6: Final answer
    x = 16,941.69

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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.