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Finding the Fourth Proportional to 26,859.47, 40,289.21 and 8,391.47

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Solution

The fourth proportional to 26,859.47, 40,289.21 and 8,391.47 is: 12,587.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,859.47 : 40,289.21 = 8,391.47 : x
  2. Step 2: Convert to fraction form
    26,859.47/40,289.21 = 8,391.47/x
  3. Step 3: Cross multiply
    26,859.47x = 40,289.21 × 8,391.47
  4. Step 4: Simplify right side
    26,859.47x = 338,085,604.72
  5. Step 5: Solve for x
    x = 338,085,604.72/26,859.47
  6. Step 6: Final answer
    x = 12,587.20

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1.5x scale

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.