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Finding the Fourth Proportional to 27,131.88, 40,682.88 and 8,406.72

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Solution

The fourth proportional to 27,131.88, 40,682.88 and 8,406.72 is: 12,605.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,131.88 : 40,682.88 = 8,406.72 : x
  2. Step 2: Convert to fraction form
    27,131.88/40,682.88 = 8,406.72/x
  3. Step 3: Cross multiply
    27,131.88x = 40,682.88 × 8,406.72
  4. Step 4: Simplify right side
    27,131.88x = 342,009,580.95
  5. Step 5: Solve for x
    x = 342,009,580.95/27,131.88
  6. Step 6: Final answer
    x = 12,605.45

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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.