Home / 12,789.36-19,176.12-4,989

Finding the Fourth Proportional to 12,789.36, 19,176.12 and 4,989

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Solution

The fourth proportional to 12,789.36, 19,176.12 and 4,989 is: 7,480.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789.36 : 19,176.12 = 4,989 : x
  2. Step 2: Convert to fraction form
    12,789.36/19,176.12 = 4,989/x
  3. Step 3: Cross multiply
    12,789.36x = 19,176.12 × 4,989
  4. Step 4: Simplify right side
    12,789.36x = 95,669,662.68
  5. Step 5: Solve for x
    x = 95,669,662.68/12,789.36
  6. Step 6: Final answer
    x = 7,480.41

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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.