Home / 12,505.78-18,758.70-3,740.80

Finding the Fourth Proportional to 12,505.78, 18,758.70 and 3,740.80

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Solution

The fourth proportional to 12,505.78, 18,758.70 and 3,740.80 is: 5,611.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.78 : 18,758.70 = 3,740.80 : x
  2. Step 2: Convert to fraction form
    12,505.78/18,758.70 = 3,740.80/x
  3. Step 3: Cross multiply
    12,505.78x = 18,758.70 × 3,740.80
  4. Step 4: Simplify right side
    12,505.78x = 70,172,544.96
  5. Step 5: Solve for x
    x = 70,172,544.96/12,505.78
  6. Step 6: Final answer
    x = 5,611.21

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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.