Home / 12,705.78-19,047.30-4,912.80

Finding the Fourth Proportional to 12,705.78, 19,047.30 and 4,912.80

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Solution

The fourth proportional to 12,705.78, 19,047.30 and 4,912.80 is: 7,364.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,705.78 : 19,047.30 = 4,912.80 : x
  2. Step 2: Convert to fraction form
    12,705.78/19,047.30 = 4,912.80/x
  3. Step 3: Cross multiply
    12,705.78x = 19,047.30 × 4,912.80
  4. Step 4: Simplify right side
    12,705.78x = 93,575,575.44
  5. Step 5: Solve for x
    x = 93,575,575.44/12,705.78
  6. Step 6: Final answer
    x = 7,364.80

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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.