Home / 13,643.48-20,358.82-12,172.52

Finding the Fourth Proportional to 13,643.48, 20,358.82 and 12,172.52

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Solution

The fourth proportional to 13,643.48, 20,358.82 and 12,172.52 is: 18,163.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,643.48 : 20,358.82 = 12,172.52 : x
  2. Step 2: Convert to fraction form
    13,643.48/20,358.82 = 12,172.52/x
  3. Step 3: Cross multiply
    13,643.48x = 20,358.82 × 12,172.52
  4. Step 4: Simplify right side
    13,643.48x = 247,818,143.63
  5. Step 5: Solve for x
    x = 247,818,143.63/13,643.48
  6. Step 6: Final answer
    x = 18,163.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.