Home / 12,648.72-18,971.64-3,415.44

Finding the Fourth Proportional to 12,648.72, 18,971.64 and 3,415.44

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Solution

The fourth proportional to 12,648.72, 18,971.64 and 3,415.44 is: 5,122.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,648.72 : 18,971.64 = 3,415.44 : x
  2. Step 2: Convert to fraction form
    12,648.72/18,971.64 = 3,415.44/x
  3. Step 3: Cross multiply
    12,648.72x = 18,971.64 × 3,415.44
  4. Step 4: Simplify right side
    12,648.72x = 64,796,498.12
  5. Step 5: Solve for x
    x = 64,796,498.12/12,648.72
  6. Step 6: Final answer
    x = 5,122.77

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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.