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Finding the Fourth Proportional to 18,926.26, 26,112.99 and 12,212.17

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Solution

The fourth proportional to 18,926.26, 26,112.99 and 12,212.17 is: 16,849.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,926.26 : 26,112.99 = 12,212.17 : x
  2. Step 2: Convert to fraction form
    18,926.26/26,112.99 = 12,212.17/x
  3. Step 3: Cross multiply
    18,926.26x = 26,112.99 × 12,212.17
  4. Step 4: Simplify right side
    18,926.26x = 318,896,273.09
  5. Step 5: Solve for x
    x = 318,896,273.09/18,926.26
  6. Step 6: Final answer
    x = 16,849.41

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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.