Home / 6,420.90-9,631.38-2,722.20

Finding the Fourth Proportional to 6,420.90, 9,631.38 and 2,722.20

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Solution

The fourth proportional to 6,420.90, 9,631.38 and 2,722.20 is: 4,083.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.90 : 9,631.38 = 2,722.20 : x
  2. Step 2: Convert to fraction form
    6,420.90/9,631.38 = 2,722.20/x
  3. Step 3: Cross multiply
    6,420.90x = 9,631.38 × 2,722.20
  4. Step 4: Simplify right side
    6,420.90x = 26,218,542.64
  5. Step 5: Solve for x
    x = 26,218,542.64/6,420.90
  6. Step 6: Final answer
    x = 4,083.31

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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.