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Finding the Fourth Proportional to 13,018.62, 17,956.44 and 8,986.98

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Solution

The fourth proportional to 13,018.62, 17,956.44 and 8,986.98 is: 12,395.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,018.62 : 17,956.44 = 8,986.98 : x
  2. Step 2: Convert to fraction form
    13,018.62/17,956.44 = 8,986.98/x
  3. Step 3: Cross multiply
    13,018.62x = 17,956.44 × 8,986.98
  4. Step 4: Simplify right side
    13,018.62x = 161,374,167.15
  5. Step 5: Solve for x
    x = 161,374,167.15/13,018.62
  6. Step 6: Final answer
    x = 12,395.64

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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.