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Finding the Fourth Proportional to 12,412.70, 18,660.05 and 11,499.62

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Solution

The fourth proportional to 12,412.70, 18,660.05 and 11,499.62 is: 17,287.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,412.70 : 18,660.05 = 11,499.62 : x
  2. Step 2: Convert to fraction form
    12,412.70/18,660.05 = 11,499.62/x
  3. Step 3: Cross multiply
    12,412.70x = 18,660.05 × 11,499.62
  4. Step 4: Simplify right side
    12,412.70x = 214,583,559.58
  5. Step 5: Solve for x
    x = 214,583,559.58/12,412.70
  6. Step 6: Final answer
    x = 17,287.43

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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.