Home / 20,316.60-30,479.87-6,989.80

Finding the Fourth Proportional to 20,316.60, 30,479.87 and 6,989.80

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Solution

The fourth proportional to 20,316.60, 30,479.87 and 6,989.80 is: 10,486.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,316.60 : 30,479.87 = 6,989.80 : x
  2. Step 2: Convert to fraction form
    20,316.60/30,479.87 = 6,989.80/x
  3. Step 3: Cross multiply
    20,316.60x = 30,479.87 × 6,989.80
  4. Step 4: Simplify right side
    20,316.60x = 213,048,195.33
  5. Step 5: Solve for x
    x = 213,048,195.33/20,316.60
  6. Step 6: Final answer
    x = 10,486.41

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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.