Home / 12,636.48-18,956.84-3,869.28

Finding the Fourth Proportional to 12,636.48, 18,956.84 and 3,869.28

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Solution

The fourth proportional to 12,636.48, 18,956.84 and 3,869.28 is: 5,804.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,636.48 : 18,956.84 = 3,869.28 : x
  2. Step 2: Convert to fraction form
    12,636.48/18,956.84 = 3,869.28/x
  3. Step 3: Cross multiply
    12,636.48x = 18,956.84 × 3,869.28
  4. Step 4: Simplify right side
    12,636.48x = 73,349,321.88
  5. Step 5: Solve for x
    x = 73,349,321.88/12,636.48
  6. Step 6: Final answer
    x = 5,804.57

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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.