Home / 20,479.23-30,724.21-6,438.69

Finding the Fourth Proportional to 20,479.23, 30,724.21 and 6,438.69

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Solution

The fourth proportional to 20,479.23, 30,724.21 and 6,438.69 is: 9,659.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.23 : 30,724.21 = 6,438.69 : x
  2. Step 2: Convert to fraction form
    20,479.23/30,724.21 = 6,438.69/x
  3. Step 3: Cross multiply
    20,479.23x = 30,724.21 × 6,438.69
  4. Step 4: Simplify right side
    20,479.23x = 197,823,663.68
  5. Step 5: Solve for x
    x = 197,823,663.68/20,479.23
  6. Step 6: Final answer
    x = 9,659.72

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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.