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Finding the Fourth Proportional to 20,618.08, 30,928.24 and 5,828.16

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Solution

The fourth proportional to 20,618.08, 30,928.24 and 5,828.16 is: 8,742.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.08 : 30,928.24 = 5,828.16 : x
  2. Step 2: Convert to fraction form
    20,618.08/30,928.24 = 5,828.16/x
  3. Step 3: Cross multiply
    20,618.08x = 30,928.24 × 5,828.16
  4. Step 4: Simplify right side
    20,618.08x = 180,254,731.24
  5. Step 5: Solve for x
    x = 180,254,731.24/20,618.08
  6. Step 6: Final answer
    x = 8,742.56

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