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Finding the Fourth Proportional to 18,996.28, 28,487.94 and 7,313.56

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Solution

The fourth proportional to 18,996.28, 28,487.94 and 7,313.56 is: 10,967.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,996.28 : 28,487.94 = 7,313.56 : x
  2. Step 2: Convert to fraction form
    18,996.28/28,487.94 = 7,313.56/x
  3. Step 3: Cross multiply
    18,996.28x = 28,487.94 × 7,313.56
  4. Step 4: Simplify right side
    18,996.28x = 208,348,258.47
  5. Step 5: Solve for x
    x = 208,348,258.47/18,996.28
  6. Step 6: Final answer
    x = 10,967.85

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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.