Home / 25,806.40-38,680.80-13,321.60

Finding the Fourth Proportional to 25,806.40, 38,680.80 and 13,321.60

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Solution

The fourth proportional to 25,806.40, 38,680.80 and 13,321.60 is: 19,967.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,806.40 : 38,680.80 = 13,321.60 : x
  2. Step 2: Convert to fraction form
    25,806.40/38,680.80 = 13,321.60/x
  3. Step 3: Cross multiply
    25,806.40x = 38,680.80 × 13,321.60
  4. Step 4: Simplify right side
    25,806.40x = 515,290,145.28
  5. Step 5: Solve for x
    x = 515,290,145.28/25,806.40
  6. Step 6: Final answer
    x = 19,967.53

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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.