Home / 20,816.52-28,727.56-11,863.78

Finding the Fourth Proportional to 20,816.52, 28,727.56 and 11,863.78

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Solution

The fourth proportional to 20,816.52, 28,727.56 and 11,863.78 is: 16,372.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.52 : 28,727.56 = 11,863.78 : x
  2. Step 2: Convert to fraction form
    20,816.52/28,727.56 = 11,863.78/x
  3. Step 3: Cross multiply
    20,816.52x = 28,727.56 × 11,863.78
  4. Step 4: Simplify right side
    20,816.52x = 340,817,451.78
  5. Step 5: Solve for x
    x = 340,817,451.78/20,816.52
  6. Step 6: Final answer
    x = 16,372.45

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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.