Home / 15,571.85-21,491.90-9,198.02

Finding the Fourth Proportional to 15,571.85, 21,491.90 and 9,198.02

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Solution

The fourth proportional to 15,571.85, 21,491.90 and 9,198.02 is: 12,694.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,571.85 : 21,491.90 = 9,198.02 : x
  2. Step 2: Convert to fraction form
    15,571.85/21,491.90 = 9,198.02/x
  3. Step 3: Cross multiply
    15,571.85x = 21,491.90 × 9,198.02
  4. Step 4: Simplify right side
    15,571.85x = 197,682,968.27
  5. Step 5: Solve for x
    x = 197,682,968.27/15,571.85
  6. Step 6: Final answer
    x = 12,694.90

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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.