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Finding the Fourth Proportional to 18,894.69, 26,069.94 and 12,172.23

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Solution

The fourth proportional to 18,894.69, 26,069.94 and 12,172.23 is: 16,794.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,894.69 : 26,069.94 = 12,172.23 : x
  2. Step 2: Convert to fraction form
    18,894.69/26,069.94 = 12,172.23/x
  3. Step 3: Cross multiply
    18,894.69x = 26,069.94 × 12,172.23
  4. Step 4: Simplify right side
    18,894.69x = 317,329,305.77
  5. Step 5: Solve for x
    x = 317,329,305.77/18,894.69
  6. Step 6: Final answer
    x = 16,794.63

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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.