Home / 12,131.79-18,188.68-3,807.06

Finding the Fourth Proportional to 12,131.79, 18,188.68 and 3,807.06

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Solution

The fourth proportional to 12,131.79, 18,188.68 and 3,807.06 is: 5,707.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,131.79 : 18,188.68 = 3,807.06 : x
  2. Step 2: Convert to fraction form
    12,131.79/18,188.68 = 3,807.06/x
  3. Step 3: Cross multiply
    12,131.79x = 18,188.68 × 3,807.06
  4. Step 4: Simplify right side
    12,131.79x = 69,245,396.08
  5. Step 5: Solve for x
    x = 69,245,396.08/12,131.79
  6. Step 6: Final answer
    x = 5,707.76

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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.