Home / 20,816.56-28,727.46-11,385.76

Finding the Fourth Proportional to 20,816.56, 28,727.46 and 11,385.76

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Solution

The fourth proportional to 20,816.56, 28,727.46 and 11,385.76 is: 15,712.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.56 : 28,727.46 = 11,385.76 : x
  2. Step 2: Convert to fraction form
    20,816.56/28,727.46 = 11,385.76/x
  3. Step 3: Cross multiply
    20,816.56x = 28,727.46 × 11,385.76
  4. Step 4: Simplify right side
    20,816.56x = 327,083,964.97
  5. Step 5: Solve for x
    x = 327,083,964.97/20,816.56
  6. Step 6: Final answer
    x = 15,712.68

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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.