Home / 6,215.12-8,576.64-3,420.56

Finding the Fourth Proportional to 6,215.12, 8,576.64 and 3,420.56

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Solution

The fourth proportional to 6,215.12, 8,576.64 and 3,420.56 is: 4,720.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,215.12 : 8,576.64 = 3,420.56 : x
  2. Step 2: Convert to fraction form
    6,215.12/8,576.64 = 3,420.56/x
  3. Step 3: Cross multiply
    6,215.12x = 8,576.64 × 3,420.56
  4. Step 4: Simplify right side
    6,215.12x = 29,336,911.72
  5. Step 5: Solve for x
    x = 29,336,911.72/6,215.12
  6. Step 6: Final answer
    x = 4,720.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.