Home / 12,156.42-18,235.65-3,391.44

Finding the Fourth Proportional to 12,156.42, 18,235.65 and 3,391.44

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Solution

The fourth proportional to 12,156.42, 18,235.65 and 3,391.44 is: 5,087.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.42 : 18,235.65 = 3,391.44 : x
  2. Step 2: Convert to fraction form
    12,156.42/18,235.65 = 3,391.44/x
  3. Step 3: Cross multiply
    12,156.42x = 18,235.65 × 3,391.44
  4. Step 4: Simplify right side
    12,156.42x = 61,845,112.84
  5. Step 5: Solve for x
    x = 61,845,112.84/12,156.42
  6. Step 6: Final answer
    x = 5,087.44

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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.