Home / 20,704.40-28,571.87-11,272.96

Finding the Fourth Proportional to 20,704.40, 28,571.87 and 11,272.96

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Solution

The fourth proportional to 20,704.40, 28,571.87 and 11,272.96 is: 15,556.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.40 : 28,571.87 = 11,272.96 : x
  2. Step 2: Convert to fraction form
    20,704.40/28,571.87 = 11,272.96/x
  3. Step 3: Cross multiply
    20,704.40x = 28,571.87 × 11,272.96
  4. Step 4: Simplify right side
    20,704.40x = 322,089,547.64
  5. Step 5: Solve for x
    x = 322,089,547.64/20,704.40
  6. Step 6: Final answer
    x = 15,556.57

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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.