Home / 25,379.73-34,990.47-20,825.73

Finding the Fourth Proportional to 25,379.73, 34,990.47 and 20,825.73

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Solution

The fourth proportional to 25,379.73, 34,990.47 and 20,825.73 is: 28,711.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,379.73 : 34,990.47 = 20,825.73 : x
  2. Step 2: Convert to fraction form
    25,379.73/34,990.47 = 20,825.73/x
  3. Step 3: Cross multiply
    25,379.73x = 34,990.47 × 20,825.73
  4. Step 4: Simplify right side
    25,379.73x = 728,702,080.79
  5. Step 5: Solve for x
    x = 728,702,080.79/25,379.73
  6. Step 6: Final answer
    x = 28,711.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.