Home / 20,090.64-30,145.68-12,295.20

Finding the Fourth Proportional to 20,090.64, 30,145.68 and 12,295.20

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Solution

The fourth proportional to 20,090.64, 30,145.68 and 12,295.20 is: 18,448.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.64 : 30,145.68 = 12,295.20 : x
  2. Step 2: Convert to fraction form
    20,090.64/30,145.68 = 12,295.20/x
  3. Step 3: Cross multiply
    20,090.64x = 30,145.68 × 12,295.20
  4. Step 4: Simplify right side
    20,090.64x = 370,647,164.74
  5. Step 5: Solve for x
    x = 370,647,164.74/20,090.64
  6. Step 6: Final answer
    x = 18,448.75

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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.