Home / 12,218.15-18,329.18-3,900.39

Finding the Fourth Proportional to 12,218.15, 18,329.18 and 3,900.39

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Solution

The fourth proportional to 12,218.15, 18,329.18 and 3,900.39 is: 5,851.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.15 : 18,329.18 = 3,900.39 : x
  2. Step 2: Convert to fraction form
    12,218.15/18,329.18 = 3,900.39/x
  3. Step 3: Cross multiply
    12,218.15x = 18,329.18 × 3,900.39
  4. Step 4: Simplify right side
    12,218.15x = 71,490,930.88
  5. Step 5: Solve for x
    x = 71,490,930.88/12,218.15
  6. Step 6: Final answer
    x = 5,851.21

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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.