Home / 12,145.90-18,219.33-3,381.58

Finding the Fourth Proportional to 12,145.90, 18,219.33 and 3,381.58

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Solution

The fourth proportional to 12,145.90, 18,219.33 and 3,381.58 is: 5,072.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.90 : 18,219.33 = 3,381.58 : x
  2. Step 2: Convert to fraction form
    12,145.90/18,219.33 = 3,381.58/x
  3. Step 3: Cross multiply
    12,145.90x = 18,219.33 × 3,381.58
  4. Step 4: Simplify right side
    12,145.90x = 61,610,121.94
  5. Step 5: Solve for x
    x = 61,610,121.94/12,145.90
  6. Step 6: Final answer
    x = 5,072.50

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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.