Home / 20,943.06-28,902-11,511.90

Finding the Fourth Proportional to 20,943.06, 28,902 and 11,511.90

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Solution

The fourth proportional to 20,943.06, 28,902 and 11,511.90 is: 15,886.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.06 : 28,902 = 11,511.90 : x
  2. Step 2: Convert to fraction form
    20,943.06/28,902 = 11,511.90/x
  3. Step 3: Cross multiply
    20,943.06x = 28,902 × 11,511.90
  4. Step 4: Simplify right side
    20,943.06x = 332,716,933.80
  5. Step 5: Solve for x
    x = 332,716,933.80/20,943.06
  6. Step 6: Final answer
    x = 15,886.74

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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.