Home / 12,645.74-18,971.32-3,881.36

Finding the Fourth Proportional to 12,645.74, 18,971.32 and 3,881.36

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Solution

The fourth proportional to 12,645.74, 18,971.32 and 3,881.36 is: 5,822.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.74 : 18,971.32 = 3,881.36 : x
  2. Step 2: Convert to fraction form
    12,645.74/18,971.32 = 3,881.36/x
  3. Step 3: Cross multiply
    12,645.74x = 18,971.32 × 3,881.36
  4. Step 4: Simplify right side
    12,645.74x = 73,634,522.60
  5. Step 5: Solve for x
    x = 73,634,522.60/12,645.74
  6. Step 6: Final answer
    x = 5,822.87

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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.