Home / 12,636.87-18,806.07-12,216.42

Finding the Fourth Proportional to 12,636.87, 18,806.07 and 12,216.42

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Solution

The fourth proportional to 12,636.87, 18,806.07 and 12,216.42 is: 18,180.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,636.87 : 18,806.07 = 12,216.42 : x
  2. Step 2: Convert to fraction form
    12,636.87/18,806.07 = 12,216.42/x
  3. Step 3: Cross multiply
    12,636.87x = 18,806.07 × 12,216.42
  4. Step 4: Simplify right side
    12,636.87x = 229,742,849.67
  5. Step 5: Solve for x
    x = 229,742,849.67/12,636.87
  6. Step 6: Final answer
    x = 18,180.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.