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Finding the Fourth Proportional to 6,420.28, 9,630.42 and 2,418.42

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Solution

The fourth proportional to 6,420.28, 9,630.42 and 2,418.42 is: 3,627.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.28 : 9,630.42 = 2,418.42 : x
  2. Step 2: Convert to fraction form
    6,420.28/9,630.42 = 2,418.42/x
  3. Step 3: Cross multiply
    6,420.28x = 9,630.42 × 2,418.42
  4. Step 4: Simplify right side
    6,420.28x = 23,290,394.29
  5. Step 5: Solve for x
    x = 23,290,394.29/6,420.28
  6. Step 6: Final answer
    x = 3,627.63

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Double scale
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Similar ratio
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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.