Home / 12,882.70-19,312.80-4,990.60

Finding the Fourth Proportional to 12,882.70, 19,312.80 and 4,990.60

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Solution

The fourth proportional to 12,882.70, 19,312.80 and 4,990.60 is: 7,481.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,882.70 : 19,312.80 = 4,990.60 : x
  2. Step 2: Convert to fraction form
    12,882.70/19,312.80 = 4,990.60/x
  3. Step 3: Cross multiply
    12,882.70x = 19,312.80 × 4,990.60
  4. Step 4: Simplify right side
    12,882.70x = 96,382,459.68
  5. Step 5: Solve for x
    x = 96,382,459.68/12,882.70
  6. Step 6: Final answer
    x = 7,481.54

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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.