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Finding the Fourth Proportional to 16,821.28, 25,236.78 and 6,958.72

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Solution

The fourth proportional to 16,821.28, 25,236.78 and 6,958.72 is: 10,440.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,821.28 : 25,236.78 = 6,958.72 : x
  2. Step 2: Convert to fraction form
    16,821.28/25,236.78 = 6,958.72/x
  3. Step 3: Cross multiply
    16,821.28x = 25,236.78 × 6,958.72
  4. Step 4: Simplify right side
    16,821.28x = 175,615,685.72
  5. Step 5: Solve for x
    x = 175,615,685.72/16,821.28
  6. Step 6: Final answer
    x = 10,440.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.