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Finding the Fourth Proportional to 13,509.20, 20,268.60 and 13,029.20

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Solution

The fourth proportional to 13,509.20, 20,268.60 and 13,029.20 is: 19,548.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,509.20 : 20,268.60 = 13,029.20 : x
  2. Step 2: Convert to fraction form
    13,509.20/20,268.60 = 13,029.20/x
  3. Step 3: Cross multiply
    13,509.20x = 20,268.60 × 13,029.20
  4. Step 4: Simplify right side
    13,509.20x = 264,083,643.12
  5. Step 5: Solve for x
    x = 264,083,643.12/13,509.20
  6. Step 6: Final answer
    x = 19,548.43

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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.