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Finding the Fourth Proportional to 18,360.63, 27,540.87 and 5,213.00

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Solution

The fourth proportional to 18,360.63, 27,540.87 and 5,213.00 is: 7,819.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,360.63 : 27,540.87 = 5,213.00 : x
  2. Step 2: Convert to fraction form
    18,360.63/27,540.87 = 5,213.00/x
  3. Step 3: Cross multiply
    18,360.63x = 27,540.87 × 5,213.00
  4. Step 4: Simplify right side
    18,360.63x = 143,570,486.46
  5. Step 5: Solve for x
    x = 143,570,486.46/18,360.63
  6. Step 6: Final answer
    x = 7,819.48

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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.