Home / 20,728.37-31,092.55-5,145.99

Finding the Fourth Proportional to 20,728.37, 31,092.55 and 5,145.99

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Solution

The fourth proportional to 20,728.37, 31,092.55 and 5,145.99 is: 7,718.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.37 : 31,092.55 = 5,145.99 : x
  2. Step 2: Convert to fraction form
    20,728.37/31,092.55 = 5,145.99/x
  3. Step 3: Cross multiply
    20,728.37x = 31,092.55 × 5,145.99
  4. Step 4: Simplify right side
    20,728.37x = 160,002,029.11
  5. Step 5: Solve for x
    x = 160,002,029.11/20,728.37
  6. Step 6: Final answer
    x = 7,718.99

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1.5x scale

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.