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Finding the Fourth Proportional to 20,057.60, 30,009.60 and 13,145.60

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Solution

The fourth proportional to 20,057.60, 30,009.60 and 13,145.60 is: 19,668.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,057.60 : 30,009.60 = 13,145.60 : x
  2. Step 2: Convert to fraction form
    20,057.60/30,009.60 = 13,145.60/x
  3. Step 3: Cross multiply
    20,057.60x = 30,009.60 × 13,145.60
  4. Step 4: Simplify right side
    20,057.60x = 394,494,197.76
  5. Step 5: Solve for x
    x = 394,494,197.76/20,057.60
  6. Step 6: Final answer
    x = 19,668.07

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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.