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Finding the Fourth Proportional to 8,630.76, 12,946.80 and 2,791.56

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Solution

The fourth proportional to 8,630.76, 12,946.80 and 2,791.56 is: 4,187.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630.76 : 12,946.80 = 2,791.56 : x
  2. Step 2: Convert to fraction form
    8,630.76/12,946.80 = 2,791.56/x
  3. Step 3: Cross multiply
    8,630.76x = 12,946.80 × 2,791.56
  4. Step 4: Simplify right side
    8,630.76x = 36,141,769.01
  5. Step 5: Solve for x
    x = 36,141,769.01/8,630.76
  6. Step 6: Final answer
    x = 4,187.55

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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.