Home / 20,631.26-30,928.08-7,480.64

Finding the Fourth Proportional to 20,631.26, 30,928.08 and 7,480.64

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Solution

The fourth proportional to 20,631.26, 30,928.08 and 7,480.64 is: 11,214.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.26 : 30,928.08 = 7,480.64 : x
  2. Step 2: Convert to fraction form
    20,631.26/30,928.08 = 7,480.64/x
  3. Step 3: Cross multiply
    20,631.26x = 30,928.08 × 7,480.64
  4. Step 4: Simplify right side
    20,631.26x = 231,361,832.37
  5. Step 5: Solve for x
    x = 231,361,832.37/20,631.26
  6. Step 6: Final answer
    x = 11,214.14

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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.