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Finding the Fourth Proportional to 18,615.60, 27,899.64 and 8,733.06

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Solution

The fourth proportional to 18,615.60, 27,899.64 and 8,733.06 is: 13,088.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.60 : 27,899.64 = 8,733.06 : x
  2. Step 2: Convert to fraction form
    18,615.60/27,899.64 = 8,733.06/x
  3. Step 3: Cross multiply
    18,615.60x = 27,899.64 × 8,733.06
  4. Step 4: Simplify right side
    18,615.60x = 243,649,230.10
  5. Step 5: Solve for x
    x = 243,649,230.10/18,615.60
  6. Step 6: Final answer
    x = 13,088.44

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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.