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Finding the Fourth Proportional to 18,520.16, 27,777 and 5,374.40

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Solution

The fourth proportional to 18,520.16, 27,777 and 5,374.40 is: 8,060.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,520.16 : 27,777 = 5,374.40 : x
  2. Step 2: Convert to fraction form
    18,520.16/27,777 = 5,374.40/x
  3. Step 3: Cross multiply
    18,520.16x = 27,777 × 5,374.40
  4. Step 4: Simplify right side
    18,520.16x = 149,284,708.80
  5. Step 5: Solve for x
    x = 149,284,708.80/18,520.16
  6. Step 6: Final answer
    x = 8,060.66

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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.