Home / 6,464.08-8,918.40-3,947.20

Finding the Fourth Proportional to 6,464.08, 8,918.40 and 3,947.20

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Solution

The fourth proportional to 6,464.08, 8,918.40 and 3,947.20 is: 5,445.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,464.08 : 8,918.40 = 3,947.20 : x
  2. Step 2: Convert to fraction form
    6,464.08/8,918.40 = 3,947.20/x
  3. Step 3: Cross multiply
    6,464.08x = 8,918.40 × 3,947.20
  4. Step 4: Simplify right side
    6,464.08x = 35,202,708.48
  5. Step 5: Solve for x
    x = 35,202,708.48/6,464.08
  6. Step 6: Final answer
    x = 5,445.90

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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.