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Finding the Fourth Proportional to 19,713.91, 27,201.13 and 11,328.79

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Solution

The fourth proportional to 19,713.91, 27,201.13 and 11,328.79 is: 15,631.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,713.91 : 27,201.13 = 11,328.79 : x
  2. Step 2: Convert to fraction form
    19,713.91/27,201.13 = 11,328.79/x
  3. Step 3: Cross multiply
    19,713.91x = 27,201.13 × 11,328.79
  4. Step 4: Simplify right side
    19,713.91x = 308,155,889.53
  5. Step 5: Solve for x
    x = 308,155,889.53/19,713.91
  6. Step 6: Final answer
    x = 15,631.39

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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.