Home / 12,127.25-18,190.86-3,807.91

Finding the Fourth Proportional to 12,127.25, 18,190.86 and 3,807.91

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Solution

The fourth proportional to 12,127.25, 18,190.86 and 3,807.91 is: 5,711.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,127.25 : 18,190.86 = 3,807.91 : x
  2. Step 2: Convert to fraction form
    12,127.25/18,190.86 = 3,807.91/x
  3. Step 3: Cross multiply
    12,127.25x = 18,190.86 × 3,807.91
  4. Step 4: Simplify right side
    12,127.25x = 69,269,138.66
  5. Step 5: Solve for x
    x = 69,269,138.66/12,127.25
  6. Step 6: Final answer
    x = 5,711.86

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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.