Home / 20,128.25-30,188.88-5,338.64

Finding the Fourth Proportional to 20,128.25, 30,188.88 and 5,338.64

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Solution

The fourth proportional to 20,128.25, 30,188.88 and 5,338.64 is: 8,007.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.25 : 30,188.88 = 5,338.64 : x
  2. Step 2: Convert to fraction form
    20,128.25/30,188.88 = 5,338.64/x
  3. Step 3: Cross multiply
    20,128.25x = 30,188.88 × 5,338.64
  4. Step 4: Simplify right side
    20,128.25x = 161,167,411.38
  5. Step 5: Solve for x
    x = 161,167,411.38/20,128.25
  6. Step 6: Final answer
    x = 8,007.03

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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.