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Finding the Fourth Proportional to 20,882.76, 28,817.94 and 11,930.19

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Solution

The fourth proportional to 20,882.76, 28,817.94 and 11,930.19 is: 16,463.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.76 : 28,817.94 = 11,930.19 : x
  2. Step 2: Convert to fraction form
    20,882.76/28,817.94 = 11,930.19/x
  3. Step 3: Cross multiply
    20,882.76x = 28,817.94 × 11,930.19
  4. Step 4: Simplify right side
    20,882.76x = 343,803,499.61
  5. Step 5: Solve for x
    x = 343,803,499.61/20,882.76
  6. Step 6: Final answer
    x = 16,463.51

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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.