Home / 20,217.49-30,320.39-6,890.18

Finding the Fourth Proportional to 20,217.49, 30,320.39 and 6,890.18

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Solution

The fourth proportional to 20,217.49, 30,320.39 and 6,890.18 is: 10,333.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,217.49 : 30,320.39 = 6,890.18 : x
  2. Step 2: Convert to fraction form
    20,217.49/30,320.39 = 6,890.18/x
  3. Step 3: Cross multiply
    20,217.49x = 30,320.39 × 6,890.18
  4. Step 4: Simplify right side
    20,217.49x = 208,912,986.12
  5. Step 5: Solve for x
    x = 208,912,986.12/20,217.49
  6. Step 6: Final answer
    x = 10,333.28

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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.