Home / 20,769.86-28,662.71-11,817.17

Finding the Fourth Proportional to 20,769.86, 28,662.71 and 11,817.17

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Solution

The fourth proportional to 20,769.86, 28,662.71 and 11,817.17 is: 16,307.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.86 : 28,662.71 = 11,817.17 : x
  2. Step 2: Convert to fraction form
    20,769.86/28,662.71 = 11,817.17/x
  3. Step 3: Cross multiply
    20,769.86x = 28,662.71 × 11,817.17
  4. Step 4: Simplify right side
    20,769.86x = 338,712,217.93
  5. Step 5: Solve for x
    x = 338,712,217.93/20,769.86
  6. Step 6: Final answer
    x = 16,307.87

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1.5x scale

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.