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Finding the Fourth Proportional to 18,926.11, 26,109.24 and 12,213.87

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Solution

The fourth proportional to 18,926.11, 26,109.24 and 12,213.87 is: 16,849.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,926.11 : 26,109.24 = 12,213.87 : x
  2. Step 2: Convert to fraction form
    18,926.11/26,109.24 = 12,213.87/x
  3. Step 3: Cross multiply
    18,926.11x = 26,109.24 × 12,213.87
  4. Step 4: Simplify right side
    18,926.11x = 318,894,863.16
  5. Step 5: Solve for x
    x = 318,894,863.16/18,926.11
  6. Step 6: Final answer
    x = 16,849.47

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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.