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Finding the Fourth Proportional to 18,615.02, 27,931.64 and 8,755.29

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Solution

The fourth proportional to 18,615.02, 27,931.64 and 8,755.29 is: 13,137.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.02 : 27,931.64 = 8,755.29 : x
  2. Step 2: Convert to fraction form
    18,615.02/27,931.64 = 8,755.29/x
  3. Step 3: Cross multiply
    18,615.02x = 27,931.64 × 8,755.29
  4. Step 4: Simplify right side
    18,615.02x = 244,549,564.60
  5. Step 5: Solve for x
    x = 244,549,564.60/18,615.02
  6. Step 6: Final answer
    x = 13,137.22

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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.