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Finding the Fourth Proportional to 13,374.72, 18,451.30 and 8,066.59

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Solution

The fourth proportional to 13,374.72, 18,451.30 and 8,066.59 is: 11,128.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,374.72 : 18,451.30 = 8,066.59 : x
  2. Step 2: Convert to fraction form
    13,374.72/18,451.30 = 8,066.59/x
  3. Step 3: Cross multiply
    13,374.72x = 18,451.30 × 8,066.59
  4. Step 4: Simplify right side
    13,374.72x = 148,839,072.07
  5. Step 5: Solve for x
    x = 148,839,072.07/13,374.72
  6. Step 6: Final answer
    x = 11,128.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.