Home / 20,806.61-28,713.13-11,375.18

Finding the Fourth Proportional to 20,806.61, 28,713.13 and 11,375.18

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Solution

The fourth proportional to 20,806.61, 28,713.13 and 11,375.18 is: 15,697.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.61 : 28,713.13 = 11,375.18 : x
  2. Step 2: Convert to fraction form
    20,806.61/28,713.13 = 11,375.18/x
  3. Step 3: Cross multiply
    20,806.61x = 28,713.13 × 11,375.18
  4. Step 4: Simplify right side
    20,806.61x = 326,616,821.67
  5. Step 5: Solve for x
    x = 326,616,821.67/20,806.61
  6. Step 6: Final answer
    x = 15,697.74

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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.