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Finding the Fourth Proportional to 27,276.80, 40,905.60 and 12,492.80

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Solution

The fourth proportional to 27,276.80, 40,905.60 and 12,492.80 is: 18,734.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,276.80 : 40,905.60 = 12,492.80 : x
  2. Step 2: Convert to fraction form
    27,276.80/40,905.60 = 12,492.80/x
  3. Step 3: Cross multiply
    27,276.80x = 40,905.60 × 12,492.80
  4. Step 4: Simplify right side
    27,276.80x = 511,025,479.68
  5. Step 5: Solve for x
    x = 511,025,479.68/27,276.80
  6. Step 6: Final answer
    x = 18,734.80

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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.