Home / 20,491.37-28,277.81-11,538.98

Finding the Fourth Proportional to 20,491.37, 28,277.81 and 11,538.98

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Solution

The fourth proportional to 20,491.37, 28,277.81 and 11,538.98 is: 15,923.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.37 : 28,277.81 = 11,538.98 : x
  2. Step 2: Convert to fraction form
    20,491.37/28,277.81 = 11,538.98/x
  3. Step 3: Cross multiply
    20,491.37x = 28,277.81 × 11,538.98
  4. Step 4: Simplify right side
    20,491.37x = 326,297,112.88
  5. Step 5: Solve for x
    x = 326,297,112.88/20,491.37
  6. Step 6: Final answer
    x = 15,923.64

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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.