Home / 20,661.94-28,525.19-15,807.54

Finding the Fourth Proportional to 20,661.94, 28,525.19 and 15,807.54

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Solution

The fourth proportional to 20,661.94, 28,525.19 and 15,807.54 is: 21,823.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.94 : 28,525.19 = 15,807.54 : x
  2. Step 2: Convert to fraction form
    20,661.94/28,525.19 = 15,807.54/x
  3. Step 3: Cross multiply
    20,661.94x = 28,525.19 × 15,807.54
  4. Step 4: Simplify right side
    20,661.94x = 450,912,993.87
  5. Step 5: Solve for x
    x = 450,912,993.87/20,661.94
  6. Step 6: Final answer
    x = 21,823.37

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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.