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Finding the Fourth Proportional to 18,732.70, 28,095.94 and 5,581.99

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Solution

The fourth proportional to 18,732.70, 28,095.94 and 5,581.99 is: 8,372.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,732.70 : 28,095.94 = 5,581.99 : x
  2. Step 2: Convert to fraction form
    18,732.70/28,095.94 = 5,581.99/x
  3. Step 3: Cross multiply
    18,732.70x = 28,095.94 × 5,581.99
  4. Step 4: Simplify right side
    18,732.70x = 156,831,256.12
  5. Step 5: Solve for x
    x = 156,831,256.12/18,732.70
  6. Step 6: Final answer
    x = 8,372.06

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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.