Home / 12,019.99-18,021.34-5,442.79

Finding the Fourth Proportional to 12,019.99, 18,021.34 and 5,442.79

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Solution

The fourth proportional to 12,019.99, 18,021.34 and 5,442.79 is: 8,160.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,019.99 : 18,021.34 = 5,442.79 : x
  2. Step 2: Convert to fraction form
    12,019.99/18,021.34 = 5,442.79/x
  3. Step 3: Cross multiply
    12,019.99x = 18,021.34 × 5,442.79
  4. Step 4: Simplify right side
    12,019.99x = 98,086,369.14
  5. Step 5: Solve for x
    x = 98,086,369.14/12,019.99
  6. Step 6: Final answer
    x = 8,160.27

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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.