Home / 19,989.36-29,958.84-10,131.12

Finding the Fourth Proportional to 19,989.36, 29,958.84 and 10,131.12

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Solution

The fourth proportional to 19,989.36, 29,958.84 and 10,131.12 is: 15,183.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989.36 : 29,958.84 = 10,131.12 : x
  2. Step 2: Convert to fraction form
    19,989.36/29,958.84 = 10,131.12/x
  3. Step 3: Cross multiply
    19,989.36x = 29,958.84 × 10,131.12
  4. Step 4: Simplify right side
    19,989.36x = 303,516,603.10
  5. Step 5: Solve for x
    x = 303,516,603.10/19,989.36
  6. Step 6: Final answer
    x = 15,183.91

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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.