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Finding the Fourth Proportional to 18,512.64, 27,768.96 and 4,662.72

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Solution

The fourth proportional to 18,512.64, 27,768.96 and 4,662.72 is: 6,994.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,512.64 : 27,768.96 = 4,662.72 : x
  2. Step 2: Convert to fraction form
    18,512.64/27,768.96 = 4,662.72/x
  3. Step 3: Cross multiply
    18,512.64x = 27,768.96 × 4,662.72
  4. Step 4: Simplify right side
    18,512.64x = 129,478,885.17
  5. Step 5: Solve for x
    x = 129,478,885.17/18,512.64
  6. Step 6: Final answer
    x = 6,994.08

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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.