Home / 12,290.63-18,434.37-3,969.78

Finding the Fourth Proportional to 12,290.63, 18,434.37 and 3,969.78

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Solution

The fourth proportional to 12,290.63, 18,434.37 and 3,969.78 is: 5,954.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,290.63 : 18,434.37 = 3,969.78 : x
  2. Step 2: Convert to fraction form
    12,290.63/18,434.37 = 3,969.78/x
  3. Step 3: Cross multiply
    12,290.63x = 18,434.37 × 3,969.78
  4. Step 4: Simplify right side
    12,290.63x = 73,180,316.77
  5. Step 5: Solve for x
    x = 73,180,316.77/12,290.63
  6. Step 6: Final answer
    x = 5,954.16

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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.