Home / 21,268.80-31,903.20-20,059.20

Finding the Fourth Proportional to 21,268.80, 31,903.20 and 20,059.20

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Solution

The fourth proportional to 21,268.80, 31,903.20 and 20,059.20 is: 30,088.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.80 : 31,903.20 = 20,059.20 : x
  2. Step 2: Convert to fraction form
    21,268.80/31,903.20 = 20,059.20/x
  3. Step 3: Cross multiply
    21,268.80x = 31,903.20 × 20,059.20
  4. Step 4: Simplify right side
    21,268.80x = 639,952,669.44
  5. Step 5: Solve for x
    x = 639,952,669.44/21,268.80
  6. Step 6: Final answer
    x = 30,088.80

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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.