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Finding the Fourth Proportional to 19,663.10, 27,141 and 13,379.12

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Solution

The fourth proportional to 19,663.10, 27,141 and 13,379.12 is: 18,467.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,663.10 : 27,141 = 13,379.12 : x
  2. Step 2: Convert to fraction form
    19,663.10/27,141 = 13,379.12/x
  3. Step 3: Cross multiply
    19,663.10x = 27,141 × 13,379.12
  4. Step 4: Simplify right side
    19,663.10x = 363,122,695.92
  5. Step 5: Solve for x
    x = 363,122,695.92/19,663.10
  6. Step 6: Final answer
    x = 18,467.22

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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.