Home / 12,930.36-19,351.80-8,003.40

Finding the Fourth Proportional to 12,930.36, 19,351.80 and 8,003.40

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Solution

The fourth proportional to 12,930.36, 19,351.80 and 8,003.40 is: 11,978.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.36 : 19,351.80 = 8,003.40 : x
  2. Step 2: Convert to fraction form
    12,930.36/19,351.80 = 8,003.40/x
  3. Step 3: Cross multiply
    12,930.36x = 19,351.80 × 8,003.40
  4. Step 4: Simplify right side
    12,930.36x = 154,880,196.12
  5. Step 5: Solve for x
    x = 154,880,196.12/12,930.36
  6. Step 6: Final answer
    x = 11,978.03

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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.