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Finding the Fourth Proportional to 18,817.28, 28,224.47 and 6,965.48

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Solution

The fourth proportional to 18,817.28, 28,224.47 and 6,965.48 is: 10,447.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,817.28 : 28,224.47 = 6,965.48 : x
  2. Step 2: Convert to fraction form
    18,817.28/28,224.47 = 6,965.48/x
  3. Step 3: Cross multiply
    18,817.28x = 28,224.47 × 6,965.48
  4. Step 4: Simplify right side
    18,817.28x = 196,597,017.03
  5. Step 5: Solve for x
    x = 196,597,017.03/18,817.28
  6. Step 6: Final answer
    x = 10,447.69

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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.