Home / 20,121.78-30,160.90-8,867.08

Finding the Fourth Proportional to 20,121.78, 30,160.90 and 8,867.08

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Solution

The fourth proportional to 20,121.78, 30,160.90 and 8,867.08 is: 13,291.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.78 : 30,160.90 = 8,867.08 : x
  2. Step 2: Convert to fraction form
    20,121.78/30,160.90 = 8,867.08/x
  3. Step 3: Cross multiply
    20,121.78x = 30,160.90 × 8,867.08
  4. Step 4: Simplify right side
    20,121.78x = 267,439,161.96
  5. Step 5: Solve for x
    x = 267,439,161.96/20,121.78
  6. Step 6: Final answer
    x = 13,291.03

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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.