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Finding the Fourth Proportional to 22,365.70, 30,863.38 and 13,755.16

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Solution

The fourth proportional to 22,365.70, 30,863.38 and 13,755.16 is: 18,981.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,365.70 : 30,863.38 = 13,755.16 : x
  2. Step 2: Convert to fraction form
    22,365.70/30,863.38 = 13,755.16/x
  3. Step 3: Cross multiply
    22,365.70x = 30,863.38 × 13,755.16
  4. Step 4: Simplify right side
    22,365.70x = 424,530,730.04
  5. Step 5: Solve for x
    x = 424,530,730.04/22,365.70
  6. Step 6: Final answer
    x = 18,981.33

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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.