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Finding the Fourth Proportional to 8,412.76, 12,615.99 and 2,789.39

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Solution

The fourth proportional to 8,412.76, 12,615.99 and 2,789.39 is: 4,183.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,412.76 : 12,615.99 = 2,789.39 : x
  2. Step 2: Convert to fraction form
    8,412.76/12,615.99 = 2,789.39/x
  3. Step 3: Cross multiply
    8,412.76x = 12,615.99 × 2,789.39
  4. Step 4: Simplify right side
    8,412.76x = 35,190,866.46
  5. Step 5: Solve for x
    x = 35,190,866.46/8,412.76
  6. Step 6: Final answer
    x = 4,183.03

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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.