Home / 12,218.79-18,329.21-3,899.98

Finding the Fourth Proportional to 12,218.79, 18,329.21 and 3,899.98

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Solution

The fourth proportional to 12,218.79, 18,329.21 and 3,899.98 is: 5,850.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.79 : 18,329.21 = 3,899.98 : x
  2. Step 2: Convert to fraction form
    12,218.79/18,329.21 = 3,899.98/x
  3. Step 3: Cross multiply
    12,218.79x = 18,329.21 × 3,899.98
  4. Step 4: Simplify right side
    12,218.79x = 71,483,552.42
  5. Step 5: Solve for x
    x = 71,483,552.42/12,218.79
  6. Step 6: Final answer
    x = 5,850.30

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1.5x scale

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.