Home / 20,838.09-28,755.86-11,888.49

Finding the Fourth Proportional to 20,838.09, 28,755.86 and 11,888.49

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Solution

The fourth proportional to 20,838.09, 28,755.86 and 11,888.49 is: 16,405.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.09 : 28,755.86 = 11,888.49 : x
  2. Step 2: Convert to fraction form
    20,838.09/28,755.86 = 11,888.49/x
  3. Step 3: Cross multiply
    20,838.09x = 28,755.86 × 11,888.49
  4. Step 4: Simplify right side
    20,838.09x = 341,863,694.61
  5. Step 5: Solve for x
    x = 341,863,694.61/20,838.09
  6. Step 6: Final answer
    x = 16,405.71

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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.