Home / 20,040.78-30,005.64-10,131.60

Finding the Fourth Proportional to 20,040.78, 30,005.64 and 10,131.60

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Solution

The fourth proportional to 20,040.78, 30,005.64 and 10,131.60 is: 15,169.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,040.78 : 30,005.64 = 10,131.60 : x
  2. Step 2: Convert to fraction form
    20,040.78/30,005.64 = 10,131.60/x
  3. Step 3: Cross multiply
    20,040.78x = 30,005.64 × 10,131.60
  4. Step 4: Simplify right side
    20,040.78x = 304,005,142.22
  5. Step 5: Solve for x
    x = 304,005,142.22/20,040.78
  6. Step 6: Final answer
    x = 15,169.33

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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.