Home / 12,021.93-18,042.20-7,860.81

Finding the Fourth Proportional to 12,021.93, 18,042.20 and 7,860.81

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Solution

The fourth proportional to 12,021.93, 18,042.20 and 7,860.81 is: 11,797.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,021.93 : 18,042.20 = 7,860.81 : x
  2. Step 2: Convert to fraction form
    12,021.93/18,042.20 = 7,860.81/x
  3. Step 3: Cross multiply
    12,021.93x = 18,042.20 × 7,860.81
  4. Step 4: Simplify right side
    12,021.93x = 141,826,266.88
  5. Step 5: Solve for x
    x = 141,826,266.88/12,021.93
  6. Step 6: Final answer
    x = 11,797.30

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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.