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Finding the Fourth Proportional to 19,663.32, 27,162.90 and 13,692

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Solution

The fourth proportional to 19,663.32, 27,162.90 and 13,692 is: 18,914.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,663.32 : 27,162.90 = 13,692 : x
  2. Step 2: Convert to fraction form
    19,663.32/27,162.90 = 13,692/x
  3. Step 3: Cross multiply
    19,663.32x = 27,162.90 × 13,692
  4. Step 4: Simplify right side
    19,663.32x = 371,914,426.80
  5. Step 5: Solve for x
    x = 371,914,426.80/19,663.32
  6. Step 6: Final answer
    x = 18,914.12

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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.