Home / 3,813.20-5,720.21-1,215.53

Finding the Fourth Proportional to 3,813.20, 5,720.21 and 1,215.53

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Solution

The fourth proportional to 3,813.20, 5,720.21 and 1,215.53 is: 1,823.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,813.20 : 5,720.21 = 1,215.53 : x
  2. Step 2: Convert to fraction form
    3,813.20/5,720.21 = 1,215.53/x
  3. Step 3: Cross multiply
    3,813.20x = 5,720.21 × 1,215.53
  4. Step 4: Simplify right side
    3,813.20x = 6,953,086.86
  5. Step 5: Solve for x
    x = 6,953,086.86/3,813.20
  6. Step 6: Final answer
    x = 1,823.43

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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.