Home / 20,853.28-28,769.52-11,901.28

Finding the Fourth Proportional to 20,853.28, 28,769.52 and 11,901.28

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Solution

The fourth proportional to 20,853.28, 28,769.52 and 11,901.28 is: 16,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.28 : 28,769.52 = 11,901.28 : x
  2. Step 2: Convert to fraction form
    20,853.28/28,769.52 = 11,901.28/x
  3. Step 3: Cross multiply
    20,853.28x = 28,769.52 × 11,901.28
  4. Step 4: Simplify right side
    20,853.28x = 342,394,112.99
  5. Step 5: Solve for x
    x = 342,394,112.99/20,853.28
  6. Step 6: Final answer
    x = 16,419.20

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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.