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Finding the Fourth Proportional to 20,156.99, 27,816.99 and 11,082.74

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Solution

The fourth proportional to 20,156.99, 27,816.99 and 11,082.74 is: 15,294.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.99 : 27,816.99 = 11,082.74 : x
  2. Step 2: Convert to fraction form
    20,156.99/27,816.99 = 11,082.74/x
  3. Step 3: Cross multiply
    20,156.99x = 27,816.99 × 11,082.74
  4. Step 4: Simplify right side
    20,156.99x = 308,288,377.57
  5. Step 5: Solve for x
    x = 308,288,377.57/20,156.99
  6. Step 6: Final answer
    x = 15,294.36

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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.