Home / 20,932.81-31,399.85-7,608.51

Finding the Fourth Proportional to 20,932.81, 31,399.85 and 7,608.51

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Solution

The fourth proportional to 20,932.81, 31,399.85 and 7,608.51 is: 11,413.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.81 : 31,399.85 = 7,608.51 : x
  2. Step 2: Convert to fraction form
    20,932.81/31,399.85 = 7,608.51/x
  3. Step 3: Cross multiply
    20,932.81x = 31,399.85 × 7,608.51
  4. Step 4: Simplify right side
    20,932.81x = 238,906,091.74
  5. Step 5: Solve for x
    x = 238,906,091.74/20,932.81
  6. Step 6: Final answer
    x = 11,413.00

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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.