Home / 20,739.04-31,099.70-7,907.80

Finding the Fourth Proportional to 20,739.04, 31,099.70 and 7,907.80

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Solution

The fourth proportional to 20,739.04, 31,099.70 and 7,907.80 is: 11,858.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.04 : 31,099.70 = 7,907.80 : x
  2. Step 2: Convert to fraction form
    20,739.04/31,099.70 = 7,907.80/x
  3. Step 3: Cross multiply
    20,739.04x = 31,099.70 × 7,907.80
  4. Step 4: Simplify right side
    20,739.04x = 245,930,207.66
  5. Step 5: Solve for x
    x = 245,930,207.66/20,739.04
  6. Step 6: Final answer
    x = 11,858.32

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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.