Home / 20,841.76-28,763.94-11,891.47

Finding the Fourth Proportional to 20,841.76, 28,763.94 and 11,891.47

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Solution

The fourth proportional to 20,841.76, 28,763.94 and 11,891.47 is: 16,411.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,841.76 : 28,763.94 = 11,891.47 : x
  2. Step 2: Convert to fraction form
    20,841.76/28,763.94 = 11,891.47/x
  3. Step 3: Cross multiply
    20,841.76x = 28,763.94 × 11,891.47
  4. Step 4: Simplify right side
    20,841.76x = 342,045,529.59
  5. Step 5: Solve for x
    x = 342,045,529.59/20,841.76
  6. Step 6: Final answer
    x = 16,411.55

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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.