Home / 20,858.23-31,287.33-8,378.25

Finding the Fourth Proportional to 20,858.23, 31,287.33 and 8,378.25

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Solution

The fourth proportional to 20,858.23, 31,287.33 and 8,378.25 is: 12,567.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.23 : 31,287.33 = 8,378.25 : x
  2. Step 2: Convert to fraction form
    20,858.23/31,287.33 = 8,378.25/x
  3. Step 3: Cross multiply
    20,858.23x = 31,287.33 × 8,378.25
  4. Step 4: Simplify right side
    20,858.23x = 262,133,072.57
  5. Step 5: Solve for x
    x = 262,133,072.57/20,858.23
  6. Step 6: Final answer
    x = 12,567.37

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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.