Home / 20,836.68-28,753.92-11,405.04

Finding the Fourth Proportional to 20,836.68, 28,753.92 and 11,405.04

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Solution

The fourth proportional to 20,836.68, 28,753.92 and 11,405.04 is: 15,738.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.68 : 28,753.92 = 11,405.04 : x
  2. Step 2: Convert to fraction form
    20,836.68/28,753.92 = 11,405.04/x
  3. Step 3: Cross multiply
    20,836.68x = 28,753.92 × 11,405.04
  4. Step 4: Simplify right side
    20,836.68x = 327,939,607.76
  5. Step 5: Solve for x
    x = 327,939,607.76/20,836.68
  6. Step 6: Final answer
    x = 15,738.57

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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.