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Finding the Fourth Proportional to 27,276.60, 40,817.70 and 18,917.40

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Solution

The fourth proportional to 27,276.60, 40,817.70 and 18,917.40 is: 28,308.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,276.60 : 40,817.70 = 18,917.40 : x
  2. Step 2: Convert to fraction form
    27,276.60/40,817.70 = 18,917.40/x
  3. Step 3: Cross multiply
    27,276.60x = 40,817.70 × 18,917.40
  4. Step 4: Simplify right side
    27,276.60x = 772,164,757.98
  5. Step 5: Solve for x
    x = 772,164,757.98/27,276.60
  6. Step 6: Final answer
    x = 28,308.69

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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.