Home / 20,861.07-28,791.68-11,908.95

Finding the Fourth Proportional to 20,861.07, 28,791.68 and 11,908.95

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Solution

The fourth proportional to 20,861.07, 28,791.68 and 11,908.95 is: 16,436.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.07 : 28,791.68 = 11,908.95 : x
  2. Step 2: Convert to fraction form
    20,861.07/28,791.68 = 11,908.95/x
  3. Step 3: Cross multiply
    20,861.07x = 28,791.68 × 11,908.95
  4. Step 4: Simplify right side
    20,861.07x = 342,878,617.99
  5. Step 5: Solve for x
    x = 342,878,617.99/20,861.07
  6. Step 6: Final answer
    x = 16,436.29

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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.