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Finding the Fourth Proportional to 18,173.80, 27,216.96 and 12,312.64

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Solution

The fourth proportional to 18,173.80, 27,216.96 and 12,312.64 is: 18,439.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,173.80 : 27,216.96 = 12,312.64 : x
  2. Step 2: Convert to fraction form
    18,173.80/27,216.96 = 12,312.64/x
  3. Step 3: Cross multiply
    18,173.80x = 27,216.96 × 12,312.64
  4. Step 4: Simplify right side
    18,173.80x = 335,112,630.37
  5. Step 5: Solve for x
    x = 335,112,630.37/18,173.80
  6. Step 6: Final answer
    x = 18,439.33

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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.