Home / 3,815.10-5,722.65-3,790.80

Finding the Fourth Proportional to 3,815.10, 5,722.65 and 3,790.80

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Solution

The fourth proportional to 3,815.10, 5,722.65 and 3,790.80 is: 5,686.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,815.10 : 5,722.65 = 3,790.80 : x
  2. Step 2: Convert to fraction form
    3,815.10/5,722.65 = 3,790.80/x
  3. Step 3: Cross multiply
    3,815.10x = 5,722.65 × 3,790.80
  4. Step 4: Simplify right side
    3,815.10x = 21,693,421.62
  5. Step 5: Solve for x
    x = 21,693,421.62/3,815.10
  6. Step 6: Final answer
    x = 5,686.20

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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.