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Finding the Fourth Proportional to 10,912.80, 16,369.20 and 5,364.48

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Solution

The fourth proportional to 10,912.80, 16,369.20 and 5,364.48 is: 8,046.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.80 : 16,369.20 = 5,364.48 : x
  2. Step 2: Convert to fraction form
    10,912.80/16,369.20 = 5,364.48/x
  3. Step 3: Cross multiply
    10,912.80x = 16,369.20 × 5,364.48
  4. Step 4: Simplify right side
    10,912.80x = 87,812,246.02
  5. Step 5: Solve for x
    x = 87,812,246.02/10,912.80
  6. Step 6: Final answer
    x = 8,046.72

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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.