Home / 20,862.86-28,791.21-11,910.18

Finding the Fourth Proportional to 20,862.86, 28,791.21 and 11,910.18

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Solution

The fourth proportional to 20,862.86, 28,791.21 and 11,910.18 is: 16,436.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.86 : 28,791.21 = 11,910.18 : x
  2. Step 2: Convert to fraction form
    20,862.86/28,791.21 = 11,910.18/x
  3. Step 3: Cross multiply
    20,862.86x = 28,791.21 × 11,910.18
  4. Step 4: Simplify right side
    20,862.86x = 342,908,493.52
  5. Step 5: Solve for x
    x = 342,908,493.52/20,862.86
  6. Step 6: Final answer
    x = 16,436.32

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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.