Home / 20,874.29-28,806.30-11,442.80

Finding the Fourth Proportional to 20,874.29, 28,806.30 and 11,442.80

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Solution

The fourth proportional to 20,874.29, 28,806.30 and 11,442.80 is: 15,790.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.29 : 28,806.30 = 11,442.80 : x
  2. Step 2: Convert to fraction form
    20,874.29/28,806.30 = 11,442.80/x
  3. Step 3: Cross multiply
    20,874.29x = 28,806.30 × 11,442.80
  4. Step 4: Simplify right side
    20,874.29x = 329,624,729.64
  5. Step 5: Solve for x
    x = 329,624,729.64/20,874.29
  6. Step 6: Final answer
    x = 15,790.94

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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.