Home / 12,986.46-19,491.84-7,135.02

Finding the Fourth Proportional to 12,986.46, 19,491.84 and 7,135.02

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Solution

The fourth proportional to 12,986.46, 19,491.84 and 7,135.02 is: 10,709.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.46 : 19,491.84 = 7,135.02 : x
  2. Step 2: Convert to fraction form
    12,986.46/19,491.84 = 7,135.02/x
  3. Step 3: Cross multiply
    12,986.46x = 19,491.84 × 7,135.02
  4. Step 4: Simplify right side
    12,986.46x = 139,074,668.24
  5. Step 5: Solve for x
    x = 139,074,668.24/12,986.46
  6. Step 6: Final answer
    x = 10,709.21

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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.