Home / 3,817.40-5,720.70-2,661.80

Finding the Fourth Proportional to 3,817.40, 5,720.70 and 2,661.80

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Solution

The fourth proportional to 3,817.40, 5,720.70 and 2,661.80 is: 3,988.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,817.40 : 5,720.70 = 2,661.80 : x
  2. Step 2: Convert to fraction form
    3,817.40/5,720.70 = 2,661.80/x
  3. Step 3: Cross multiply
    3,817.40x = 5,720.70 × 2,661.80
  4. Step 4: Simplify right side
    3,817.40x = 15,227,359.26
  5. Step 5: Solve for x
    x = 15,227,359.26/3,817.40
  6. Step 6: Final answer
    x = 3,988.93

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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.