Home / 20,021.28-27,628.20-11,068.80

Finding the Fourth Proportional to 20,021.28, 27,628.20 and 11,068.80

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Solution

The fourth proportional to 20,021.28, 27,628.20 and 11,068.80 is: 15,274.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,021.28 : 27,628.20 = 11,068.80 : x
  2. Step 2: Convert to fraction form
    20,021.28/27,628.20 = 11,068.80/x
  3. Step 3: Cross multiply
    20,021.28x = 27,628.20 × 11,068.80
  4. Step 4: Simplify right side
    20,021.28x = 305,811,020.16
  5. Step 5: Solve for x
    x = 305,811,020.16/20,021.28
  6. Step 6: Final answer
    x = 15,274.30

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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.