Home / 12,138.07-18,207.89-3,818.41

Finding the Fourth Proportional to 12,138.07, 18,207.89 and 3,818.41

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Solution

The fourth proportional to 12,138.07, 18,207.89 and 3,818.41 is: 5,727.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.07 : 18,207.89 = 3,818.41 : x
  2. Step 2: Convert to fraction form
    12,138.07/18,207.89 = 3,818.41/x
  3. Step 3: Cross multiply
    12,138.07x = 18,207.89 × 3,818.41
  4. Step 4: Simplify right side
    12,138.07x = 69,525,189.25
  5. Step 5: Solve for x
    x = 69,525,189.25/12,138.07
  6. Step 6: Final answer
    x = 5,727.86

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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.