Home / 12,138.63-18,207.91-6,940.86

Finding the Fourth Proportional to 12,138.63, 18,207.91 and 6,940.86

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Solution

The fourth proportional to 12,138.63, 18,207.91 and 6,940.86 is: 10,411.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.63 : 18,207.91 = 6,940.86 : x
  2. Step 2: Convert to fraction form
    12,138.63/18,207.91 = 6,940.86/x
  3. Step 3: Cross multiply
    12,138.63x = 18,207.91 × 6,940.86
  4. Step 4: Simplify right side
    12,138.63x = 126,378,554.20
  5. Step 5: Solve for x
    x = 126,378,554.20/12,138.63
  6. Step 6: Final answer
    x = 10,411.27

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1.5x scale

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.