Home / 20,479.36-30,705.47-8,000.57

Finding the Fourth Proportional to 20,479.36, 30,705.47 and 8,000.57

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Solution

The fourth proportional to 20,479.36, 30,705.47 and 8,000.57 is: 11,995.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.36 : 30,705.47 = 8,000.57 : x
  2. Step 2: Convert to fraction form
    20,479.36/30,705.47 = 8,000.57/x
  3. Step 3: Cross multiply
    20,479.36x = 30,705.47 × 8,000.57
  4. Step 4: Simplify right side
    20,479.36x = 245,661,262.12
  5. Step 5: Solve for x
    x = 245,661,262.12/20,479.36
  6. Step 6: Final answer
    x = 11,995.55

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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.