Home / 21,964.80-32,870.40-20,121.60

Finding the Fourth Proportional to 21,964.80, 32,870.40 and 20,121.60

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Solution

The fourth proportional to 21,964.80, 32,870.40 and 20,121.60 is: 30,112.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,964.80 : 32,870.40 = 20,121.60 : x
  2. Step 2: Convert to fraction form
    21,964.80/32,870.40 = 20,121.60/x
  3. Step 3: Cross multiply
    21,964.80x = 32,870.40 × 20,121.60
  4. Step 4: Simplify right side
    21,964.80x = 661,405,040.64
  5. Step 5: Solve for x
    x = 661,405,040.64/21,964.80
  6. Step 6: Final answer
    x = 30,112.04

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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.