Home / 12,354.13-18,531.26-3,120.13

Finding the Fourth Proportional to 12,354.13, 18,531.26 and 3,120.13

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Solution

The fourth proportional to 12,354.13, 18,531.26 and 3,120.13 is: 4,680.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,354.13 : 18,531.26 = 3,120.13 : x
  2. Step 2: Convert to fraction form
    12,354.13/18,531.26 = 3,120.13/x
  3. Step 3: Cross multiply
    12,354.13x = 18,531.26 × 3,120.13
  4. Step 4: Simplify right side
    12,354.13x = 57,819,940.26
  5. Step 5: Solve for x
    x = 57,819,940.26/12,354.13
  6. Step 6: Final answer
    x = 4,680.21

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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.