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Finding the Fourth Proportional to 27,129.43, 40,679.52 and 8,401.42

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Solution

The fourth proportional to 27,129.43, 40,679.52 and 8,401.42 is: 12,597.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,129.43 : 40,679.52 = 8,401.42 : x
  2. Step 2: Convert to fraction form
    27,129.43/40,679.52 = 8,401.42/x
  3. Step 3: Cross multiply
    27,129.43x = 40,679.52 × 8,401.42
  4. Step 4: Simplify right side
    27,129.43x = 341,765,752.26
  5. Step 5: Solve for x
    x = 341,765,752.26/27,129.43
  6. Step 6: Final answer
    x = 12,597.60

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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.