Home / 20,391.39-30,585.60-9,150.21

Finding the Fourth Proportional to 20,391.39, 30,585.60 and 9,150.21

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Solution

The fourth proportional to 20,391.39, 30,585.60 and 9,150.21 is: 13,724.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.39 : 30,585.60 = 9,150.21 : x
  2. Step 2: Convert to fraction form
    20,391.39/30,585.60 = 9,150.21/x
  3. Step 3: Cross multiply
    20,391.39x = 30,585.60 × 9,150.21
  4. Step 4: Simplify right side
    20,391.39x = 279,864,662.98
  5. Step 5: Solve for x
    x = 279,864,662.98/20,391.39
  6. Step 6: Final answer
    x = 13,724.65

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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.