Home / 20,268.72-30,406.32-7,121.52

Finding the Fourth Proportional to 20,268.72, 30,406.32 and 7,121.52

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Solution

The fourth proportional to 20,268.72, 30,406.32 and 7,121.52 is: 10,683.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,268.72 : 30,406.32 = 7,121.52 : x
  2. Step 2: Convert to fraction form
    20,268.72/30,406.32 = 7,121.52/x
  3. Step 3: Cross multiply
    20,268.72x = 30,406.32 × 7,121.52
  4. Step 4: Simplify right side
    20,268.72x = 216,539,216.01
  5. Step 5: Solve for x
    x = 216,539,216.01/20,268.72
  6. Step 6: Final answer
    x = 10,683.42

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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.