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Finding the Fourth Proportional to 20,806.71, 28,715.78 and 11,733.80

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Solution

The fourth proportional to 20,806.71, 28,715.78 and 11,733.80 is: 16,194.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.71 : 28,715.78 = 11,733.80 : x
  2. Step 2: Convert to fraction form
    20,806.71/28,715.78 = 11,733.80/x
  3. Step 3: Cross multiply
    20,806.71x = 28,715.78 × 11,733.80
  4. Step 4: Simplify right side
    20,806.71x = 336,945,219.36
  5. Step 5: Solve for x
    x = 336,945,219.36/20,806.71
  6. Step 6: Final answer
    x = 16,194.07

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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.