Home / 6,464.40-8,921.28-3,631.92

Finding the Fourth Proportional to 6,464.40, 8,921.28 and 3,631.92

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Solution

The fourth proportional to 6,464.40, 8,921.28 and 3,631.92 is: 5,012.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,464.40 : 8,921.28 = 3,631.92 : x
  2. Step 2: Convert to fraction form
    6,464.40/8,921.28 = 3,631.92/x
  3. Step 3: Cross multiply
    6,464.40x = 8,921.28 × 3,631.92
  4. Step 4: Simplify right side
    6,464.40x = 32,401,375.26
  5. Step 5: Solve for x
    x = 32,401,375.26/6,464.40
  6. Step 6: Final answer
    x = 5,012.28

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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.