Home / 13,143.50-19,709.31-3,781.37

Finding the Fourth Proportional to 13,143.50, 19,709.31 and 3,781.37

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Solution

The fourth proportional to 13,143.50, 19,709.31 and 3,781.37 is: 5,670.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.50 : 19,709.31 = 3,781.37 : x
  2. Step 2: Convert to fraction form
    13,143.50/19,709.31 = 3,781.37/x
  3. Step 3: Cross multiply
    13,143.50x = 19,709.31 × 3,781.37
  4. Step 4: Simplify right side
    13,143.50x = 74,528,193.55
  5. Step 5: Solve for x
    x = 74,528,193.55/13,143.50
  6. Step 6: Final answer
    x = 5,670.35

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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.