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Finding the Fourth Proportional to 12,619.68, 18,930.24 and 9,662.28

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Solution

The fourth proportional to 12,619.68, 18,930.24 and 9,662.28 is: 14,493.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.68 : 18,930.24 = 9,662.28 : x
  2. Step 2: Convert to fraction form
    12,619.68/18,930.24 = 9,662.28/x
  3. Step 3: Cross multiply
    12,619.68x = 18,930.24 × 9,662.28
  4. Step 4: Simplify right side
    12,619.68x = 182,909,279.35
  5. Step 5: Solve for x
    x = 182,909,279.35/12,619.68
  6. Step 6: Final answer
    x = 14,493.97

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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.