Home / 20,847.94-28,769.81-11,287.75

Finding the Fourth Proportional to 20,847.94, 28,769.81 and 11,287.75

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Solution

The fourth proportional to 20,847.94, 28,769.81 and 11,287.75 is: 15,576.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.94 : 28,769.81 = 11,287.75 : x
  2. Step 2: Convert to fraction form
    20,847.94/28,769.81 = 11,287.75/x
  3. Step 3: Cross multiply
    20,847.94x = 28,769.81 × 11,287.75
  4. Step 4: Simplify right side
    20,847.94x = 324,746,294.46
  5. Step 5: Solve for x
    x = 324,746,294.46/20,847.94
  6. Step 6: Final answer
    x = 15,576.90

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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.