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Finding the Fourth Proportional to 19,726.59, 27,221.59 and 11,230.79

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Solution

The fourth proportional to 19,726.59, 27,221.59 and 11,230.79 is: 15,497.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,726.59 : 27,221.59 = 11,230.79 : x
  2. Step 2: Convert to fraction form
    19,726.59/27,221.59 = 11,230.79/x
  3. Step 3: Cross multiply
    19,726.59x = 27,221.59 × 11,230.79
  4. Step 4: Simplify right side
    19,726.59x = 305,719,796.57
  5. Step 5: Solve for x
    x = 305,719,796.57/19,726.59
  6. Step 6: Final answer
    x = 15,497.85

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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.