Home / 18,939.16-28,369.86-15,221.26

Finding the Fourth Proportional to 18,939.16, 28,369.86 and 15,221.26

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Solution

The fourth proportional to 18,939.16, 28,369.86 and 15,221.26 is: 22,800.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.16 : 28,369.86 = 15,221.26 : x
  2. Step 2: Convert to fraction form
    18,939.16/28,369.86 = 15,221.26/x
  3. Step 3: Cross multiply
    18,939.16x = 28,369.86 × 15,221.26
  4. Step 4: Simplify right side
    18,939.16x = 431,825,015.22
  5. Step 5: Solve for x
    x = 431,825,015.22/18,939.16
  6. Step 6: Final answer
    x = 22,800.64

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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.