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Finding the Fourth Proportional to 18,954.72, 28,436.16 and 5,808

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Solution

The fourth proportional to 18,954.72, 28,436.16 and 5,808 is: 8,713.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.72 : 28,436.16 = 5,808 : x
  2. Step 2: Convert to fraction form
    18,954.72/28,436.16 = 5,808/x
  3. Step 3: Cross multiply
    18,954.72x = 28,436.16 × 5,808
  4. Step 4: Simplify right side
    18,954.72x = 165,157,217.28
  5. Step 5: Solve for x
    x = 165,157,217.28/18,954.72
  6. Step 6: Final answer
    x = 8,713.25

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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.