Home / 20,475.19-30,711.33-7,992.88

Finding the Fourth Proportional to 20,475.19, 30,711.33 and 7,992.88

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Solution

The fourth proportional to 20,475.19, 30,711.33 and 7,992.88 is: 11,988.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,475.19 : 30,711.33 = 7,992.88 : x
  2. Step 2: Convert to fraction form
    20,475.19/30,711.33 = 7,992.88/x
  3. Step 3: Cross multiply
    20,475.19x = 30,711.33 × 7,992.88
  4. Step 4: Simplify right side
    20,475.19x = 245,471,975.33
  5. Step 5: Solve for x
    x = 245,471,975.33/20,475.19
  6. Step 6: Final answer
    x = 11,988.75

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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.