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Finding the Fourth Proportional to 18,611.10, 27,861.21 and 12,018.06

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Solution

The fourth proportional to 18,611.10, 27,861.21 and 12,018.06 is: 17,991.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.10 : 27,861.21 = 12,018.06 : x
  2. Step 2: Convert to fraction form
    18,611.10/27,861.21 = 12,018.06/x
  3. Step 3: Cross multiply
    18,611.10x = 27,861.21 × 12,018.06
  4. Step 4: Simplify right side
    18,611.10x = 334,837,693.45
  5. Step 5: Solve for x
    x = 334,837,693.45/18,611.10
  6. Step 6: Final answer
    x = 17,991.29

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1.5x scale

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.