Home / 20,845.88-28,770.06-11,891.32

Finding the Fourth Proportional to 20,845.88, 28,770.06 and 11,891.32

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Solution

The fourth proportional to 20,845.88, 28,770.06 and 11,891.32 is: 16,411.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.88 : 28,770.06 = 11,891.32 : x
  2. Step 2: Convert to fraction form
    20,845.88/28,770.06 = 11,891.32/x
  3. Step 3: Cross multiply
    20,845.88x = 28,770.06 × 11,891.32
  4. Step 4: Simplify right side
    20,845.88x = 342,113,989.88
  5. Step 5: Solve for x
    x = 342,113,989.88/20,845.88
  6. Step 6: Final answer
    x = 16,411.59

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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.