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Finding the Fourth Proportional to 19,719.45, 27,211.14 and 11,759.99

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Solution

The fourth proportional to 19,719.45, 27,211.14 and 11,759.99 is: 16,227.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,719.45 : 27,211.14 = 11,759.99 : x
  2. Step 2: Convert to fraction form
    19,719.45/27,211.14 = 11,759.99/x
  3. Step 3: Cross multiply
    19,719.45x = 27,211.14 × 11,759.99
  4. Step 4: Simplify right side
    19,719.45x = 320,002,598.23
  5. Step 5: Solve for x
    x = 320,002,598.23/19,719.45
  6. Step 6: Final answer
    x = 16,227.76

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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.