Home / 20,128.05-30,135.92-13,090.47

Finding the Fourth Proportional to 20,128.05, 30,135.92 and 13,090.47

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Solution

The fourth proportional to 20,128.05, 30,135.92 and 13,090.47 is: 19,599.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.05 : 30,135.92 = 13,090.47 : x
  2. Step 2: Convert to fraction form
    20,128.05/30,135.92 = 13,090.47/x
  3. Step 3: Cross multiply
    20,128.05x = 30,135.92 × 13,090.47
  4. Step 4: Simplify right side
    20,128.05x = 394,493,291.23
  5. Step 5: Solve for x
    x = 394,493,291.23/20,128.05
  6. Step 6: Final answer
    x = 19,599.18

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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.