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Finding the Fourth Proportional to 18,641.99, 27,910.67 and 13,983.68

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Solution

The fourth proportional to 18,641.99, 27,910.67 and 13,983.68 is: 20,936.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,641.99 : 27,910.67 = 13,983.68 : x
  2. Step 2: Convert to fraction form
    18,641.99/27,910.67 = 13,983.68/x
  3. Step 3: Cross multiply
    18,641.99x = 27,910.67 × 13,983.68
  4. Step 4: Simplify right side
    18,641.99x = 390,293,877.87
  5. Step 5: Solve for x
    x = 390,293,877.87/18,641.99
  6. Step 6: Final answer
    x = 20,936.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.