Home / 20,355.76-28,090.56-13,268.80

Finding the Fourth Proportional to 20,355.76, 28,090.56 and 13,268.80

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Solution

The fourth proportional to 20,355.76, 28,090.56 and 13,268.80 is: 18,310.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,355.76 : 28,090.56 = 13,268.80 : x
  2. Step 2: Convert to fraction form
    20,355.76/28,090.56 = 13,268.80/x
  3. Step 3: Cross multiply
    20,355.76x = 28,090.56 × 13,268.80
  4. Step 4: Simplify right side
    20,355.76x = 372,728,022.53
  5. Step 5: Solve for x
    x = 372,728,022.53/20,355.76
  6. Step 6: Final answer
    x = 18,310.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.