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Finding the Fourth Proportional to 12,649.73, 18,959.81 and 9,519.71

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Solution

The fourth proportional to 12,649.73, 18,959.81 and 9,519.71 is: 14,268.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,649.73 : 18,959.81 = 9,519.71 : x
  2. Step 2: Convert to fraction form
    12,649.73/18,959.81 = 9,519.71/x
  3. Step 3: Cross multiply
    12,649.73x = 18,959.81 × 9,519.71
  4. Step 4: Simplify right side
    12,649.73x = 180,491,750.46
  5. Step 5: Solve for x
    x = 180,491,750.46/12,649.73
  6. Step 6: Final answer
    x = 14,268.43

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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.