Home / 20,217.36-30,320.20-6,890.06

Finding the Fourth Proportional to 20,217.36, 30,320.20 and 6,890.06

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Solution

The fourth proportional to 20,217.36, 30,320.20 and 6,890.06 is: 10,333.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,217.36 : 30,320.20 = 6,890.06 : x
  2. Step 2: Convert to fraction form
    20,217.36/30,320.20 = 6,890.06/x
  3. Step 3: Cross multiply
    20,217.36x = 30,320.20 × 6,890.06
  4. Step 4: Simplify right side
    20,217.36x = 208,907,997.21
  5. Step 5: Solve for x
    x = 208,907,997.21/20,217.36
  6. Step 6: Final answer
    x = 10,333.10

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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.