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Finding the Fourth Proportional to 18,889.60, 28,346.72 and 7,202.96

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Solution

The fourth proportional to 18,889.60, 28,346.72 and 7,202.96 is: 10,809.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.60 : 28,346.72 = 7,202.96 : x
  2. Step 2: Convert to fraction form
    18,889.60/28,346.72 = 7,202.96/x
  3. Step 3: Cross multiply
    18,889.60x = 28,346.72 × 7,202.96
  4. Step 4: Simplify right side
    18,889.60x = 204,180,290.29
  5. Step 5: Solve for x
    x = 204,180,290.29/18,889.60
  6. Step 6: Final answer
    x = 10,809.14

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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.