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Finding the Fourth Proportional to 26,894.80, 40,336.80 and 12,854.80

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Solution

The fourth proportional to 26,894.80, 40,336.80 and 12,854.80 is: 19,279.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,894.80 : 40,336.80 = 12,854.80 : x
  2. Step 2: Convert to fraction form
    26,894.80/40,336.80 = 12,854.80/x
  3. Step 3: Cross multiply
    26,894.80x = 40,336.80 × 12,854.80
  4. Step 4: Simplify right side
    26,894.80x = 518,521,496.64
  5. Step 5: Solve for x
    x = 518,521,496.64/26,894.80
  6. Step 6: Final answer
    x = 19,279.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.