Home / 6,621.40-9,136.96-3,788.20

Finding the Fourth Proportional to 6,621.40, 9,136.96 and 3,788.20

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Solution

The fourth proportional to 6,621.40, 9,136.96 and 3,788.20 is: 5,227.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,621.40 : 9,136.96 = 3,788.20 : x
  2. Step 2: Convert to fraction form
    6,621.40/9,136.96 = 3,788.20/x
  3. Step 3: Cross multiply
    6,621.40x = 9,136.96 × 3,788.20
  4. Step 4: Simplify right side
    6,621.40x = 34,612,631.87
  5. Step 5: Solve for x
    x = 34,612,631.87/6,621.40
  6. Step 6: Final answer
    x = 5,227.39

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.