Home / 6,420.20-9,630.30-4,451.90

Finding the Fourth Proportional to 6,420.20, 9,630.30 and 4,451.90

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Solution

The fourth proportional to 6,420.20, 9,630.30 and 4,451.90 is: 6,677.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.20 : 9,630.30 = 4,451.90 : x
  2. Step 2: Convert to fraction form
    6,420.20/9,630.30 = 4,451.90/x
  3. Step 3: Cross multiply
    6,420.20x = 9,630.30 × 4,451.90
  4. Step 4: Simplify right side
    6,420.20x = 42,873,132.57
  5. Step 5: Solve for x
    x = 42,873,132.57/6,420.20
  6. Step 6: Final answer
    x = 6,677.85

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Half scale
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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.