Home / 18,138.45-27,198.01-6,289.21

Finding the Fourth Proportional to 18,138.45, 27,198.01 and 6,289.21

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Solution

The fourth proportional to 18,138.45, 27,198.01 and 6,289.21 is: 9,430.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.45 : 27,198.01 = 6,289.21 : x
  2. Step 2: Convert to fraction form
    18,138.45/27,198.01 = 6,289.21/x
  3. Step 3: Cross multiply
    18,138.45x = 27,198.01 × 6,289.21
  4. Step 4: Simplify right side
    18,138.45x = 171,053,829.04
  5. Step 5: Solve for x
    x = 171,053,829.04/18,138.45
  6. Step 6: Final answer
    x = 9,430.45

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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.