Home / 20,829.36-28,729.48-13,268.24

Finding the Fourth Proportional to 20,829.36, 28,729.48 and 13,268.24

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Solution

The fourth proportional to 20,829.36, 28,729.48 and 13,268.24 is: 18,300.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.36 : 28,729.48 = 13,268.24 : x
  2. Step 2: Convert to fraction form
    20,829.36/28,729.48 = 13,268.24/x
  3. Step 3: Cross multiply
    20,829.36x = 28,729.48 × 13,268.24
  4. Step 4: Simplify right side
    20,829.36x = 381,189,635.72
  5. Step 5: Solve for x
    x = 381,189,635.72/20,829.36
  6. Step 6: Final answer
    x = 18,300.59

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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.