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Finding the Fourth Proportional to 18,967.64, 26,170.09 and 12,253.55

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Solution

The fourth proportional to 18,967.64, 26,170.09 and 12,253.55 is: 16,906.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,967.64 : 26,170.09 = 12,253.55 : x
  2. Step 2: Convert to fraction form
    18,967.64/26,170.09 = 12,253.55/x
  3. Step 3: Cross multiply
    18,967.64x = 26,170.09 × 12,253.55
  4. Step 4: Simplify right side
    18,967.64x = 320,676,344.84
  5. Step 5: Solve for x
    x = 320,676,344.84/18,967.64
  6. Step 6: Final answer
    x = 16,906.50

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1.5x scale

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.