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Finding the Fourth Proportional to 18,679.08, 28,018.60 and 6,984.04

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Solution

The fourth proportional to 18,679.08, 28,018.60 and 6,984.04 is: 10,476.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.08 : 28,018.60 = 6,984.04 : x
  2. Step 2: Convert to fraction form
    18,679.08/28,018.60 = 6,984.04/x
  3. Step 3: Cross multiply
    18,679.08x = 28,018.60 × 6,984.04
  4. Step 4: Simplify right side
    18,679.08x = 195,683,023.14
  5. Step 5: Solve for x
    x = 195,683,023.14/18,679.08
  6. Step 6: Final answer
    x = 10,476.05

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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.