Home / 20,451.75-30,678.30-5,659.42

Finding the Fourth Proportional to 20,451.75, 30,678.30 and 5,659.42

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Solution

The fourth proportional to 20,451.75, 30,678.30 and 5,659.42 is: 8,489.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,451.75 : 30,678.30 = 5,659.42 : x
  2. Step 2: Convert to fraction form
    20,451.75/30,678.30 = 5,659.42/x
  3. Step 3: Cross multiply
    20,451.75x = 30,678.30 × 5,659.42
  4. Step 4: Simplify right side
    20,451.75x = 173,621,384.59
  5. Step 5: Solve for x
    x = 173,621,384.59/20,451.75
  6. Step 6: Final answer
    x = 8,489.32

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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.