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Finding the Fourth Proportional to 8,412.11, 12,619.65 and 3,478.99

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Solution

The fourth proportional to 8,412.11, 12,619.65 and 3,478.99 is: 5,219.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,412.11 : 12,619.65 = 3,478.99 : x
  2. Step 2: Convert to fraction form
    8,412.11/12,619.65 = 3,478.99/x
  3. Step 3: Cross multiply
    8,412.11x = 12,619.65 × 3,478.99
  4. Step 4: Simplify right side
    8,412.11x = 43,903,555.66
  5. Step 5: Solve for x
    x = 43,903,555.66/8,412.11
  6. Step 6: Final answer
    x = 5,219.09

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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.