Home / 20,704.05-28,571.55-11,272.59

Finding the Fourth Proportional to 20,704.05, 28,571.55 and 11,272.59

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Solution

The fourth proportional to 20,704.05, 28,571.55 and 11,272.59 is: 15,556.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.05 : 28,571.55 = 11,272.59 : x
  2. Step 2: Convert to fraction form
    20,704.05/28,571.55 = 11,272.59/x
  3. Step 3: Cross multiply
    20,704.05x = 28,571.55 × 11,272.59
  4. Step 4: Simplify right side
    20,704.05x = 322,075,368.81
  5. Step 5: Solve for x
    x = 322,075,368.81/20,704.05
  6. Step 6: Final answer
    x = 15,556.15

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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.