Home / 7,428.87-11,143.31-2,808.63

Finding the Fourth Proportional to 7,428.87, 11,143.31 and 2,808.63

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Solution

The fourth proportional to 7,428.87, 11,143.31 and 2,808.63 is: 4,212.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428.87 : 11,143.31 = 2,808.63 : x
  2. Step 2: Convert to fraction form
    7,428.87/11,143.31 = 2,808.63/x
  3. Step 3: Cross multiply
    7,428.87x = 11,143.31 × 2,808.63
  4. Step 4: Simplify right side
    7,428.87x = 31,297,420.72
  5. Step 5: Solve for x
    x = 31,297,420.72/7,428.87
  6. Step 6: Final answer
    x = 4,212.95

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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.