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Finding the Fourth Proportional to 6,693.90, 10,040.85 and 4,220.70

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Solution

The fourth proportional to 6,693.90, 10,040.85 and 4,220.70 is: 6,331.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,693.90 : 10,040.85 = 4,220.70 : x
  2. Step 2: Convert to fraction form
    6,693.90/10,040.85 = 4,220.70/x
  3. Step 3: Cross multiply
    6,693.90x = 10,040.85 × 4,220.70
  4. Step 4: Simplify right side
    6,693.90x = 42,379,415.60
  5. Step 5: Solve for x
    x = 42,379,415.60/6,693.90
  6. Step 6: Final answer
    x = 6,331.05

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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.