Home / 20,489.31-30,739.25-11,126.93

Finding the Fourth Proportional to 20,489.31, 30,739.25 and 11,126.93

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Solution

The fourth proportional to 20,489.31, 30,739.25 and 11,126.93 is: 16,693.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.31 : 30,739.25 = 11,126.93 : x
  2. Step 2: Convert to fraction form
    20,489.31/30,739.25 = 11,126.93/x
  3. Step 3: Cross multiply
    20,489.31x = 30,739.25 × 11,126.93
  4. Step 4: Simplify right side
    20,489.31x = 342,033,406.15
  5. Step 5: Solve for x
    x = 342,033,406.15/20,489.31
  6. Step 6: Final answer
    x = 16,693.26

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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.