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Finding the Fourth Proportional to 22,375.94, 30,876.40 and 12,942.74

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Solution

The fourth proportional to 22,375.94, 30,876.40 and 12,942.74 is: 17,859.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,375.94 : 30,876.40 = 12,942.74 : x
  2. Step 2: Convert to fraction form
    22,375.94/30,876.40 = 12,942.74/x
  3. Step 3: Cross multiply
    22,375.94x = 30,876.40 × 12,942.74
  4. Step 4: Simplify right side
    22,375.94x = 399,625,030.60
  5. Step 5: Solve for x
    x = 399,625,030.60/22,375.94
  6. Step 6: Final answer
    x = 17,859.59

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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.