Home / 20,371.20-30,556.80-8,685.60

Finding the Fourth Proportional to 20,371.20, 30,556.80 and 8,685.60

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Solution

The fourth proportional to 20,371.20, 30,556.80 and 8,685.60 is: 13,028.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.20 : 30,556.80 = 8,685.60 : x
  2. Step 2: Convert to fraction form
    20,371.20/30,556.80 = 8,685.60/x
  3. Step 3: Cross multiply
    20,371.20x = 30,556.80 × 8,685.60
  4. Step 4: Simplify right side
    20,371.20x = 265,404,142.08
  5. Step 5: Solve for x
    x = 265,404,142.08/20,371.20
  6. Step 6: Final answer
    x = 13,028.40

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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.