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Finding the Fourth Proportional to 18,941.81, 28,418.81 and 9,081.77

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Solution

The fourth proportional to 18,941.81, 28,418.81 and 9,081.77 is: 13,625.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,941.81 : 28,418.81 = 9,081.77 : x
  2. Step 2: Convert to fraction form
    18,941.81/28,418.81 = 9,081.77/x
  3. Step 3: Cross multiply
    18,941.81x = 28,418.81 × 9,081.77
  4. Step 4: Simplify right side
    18,941.81x = 258,092,908.59
  5. Step 5: Solve for x
    x = 258,092,908.59/18,941.81
  6. Step 6: Final answer
    x = 13,625.57

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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.