Home / 12,505.78-18,758.70-3,271.78

Finding the Fourth Proportional to 12,505.78, 18,758.70 and 3,271.78

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Solution

The fourth proportional to 12,505.78, 18,758.70 and 3,271.78 is: 4,907.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.78 : 18,758.70 = 3,271.78 : x
  2. Step 2: Convert to fraction form
    12,505.78/18,758.70 = 3,271.78/x
  3. Step 3: Cross multiply
    12,505.78x = 18,758.70 × 3,271.78
  4. Step 4: Simplify right side
    12,505.78x = 61,374,339.49
  5. Step 5: Solve for x
    x = 61,374,339.49/12,505.78
  6. Step 6: Final answer
    x = 4,907.68

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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.