Home / 12,649.05-18,971.79-7,954.74

Finding the Fourth Proportional to 12,649.05, 18,971.79 and 7,954.74

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Solution

The fourth proportional to 12,649.05, 18,971.79 and 7,954.74 is: 11,930.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,649.05 : 18,971.79 = 7,954.74 : x
  2. Step 2: Convert to fraction form
    12,649.05/18,971.79 = 7,954.74/x
  3. Step 3: Cross multiply
    12,649.05x = 18,971.79 × 7,954.74
  4. Step 4: Simplify right side
    12,649.05x = 150,915,698.10
  5. Step 5: Solve for x
    x = 150,915,698.10/12,649.05
  6. Step 6: Final answer
    x = 11,930.99

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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.