Home / 20,228.70-30,310.65-12,819.90

Finding the Fourth Proportional to 20,228.70, 30,310.65 and 12,819.90

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Solution

The fourth proportional to 20,228.70, 30,310.65 and 12,819.90 is: 19,209.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,228.70 : 30,310.65 = 12,819.90 : x
  2. Step 2: Convert to fraction form
    20,228.70/30,310.65 = 12,819.90/x
  3. Step 3: Cross multiply
    20,228.70x = 30,310.65 × 12,819.90
  4. Step 4: Simplify right side
    20,228.70x = 388,579,501.94
  5. Step 5: Solve for x
    x = 388,579,501.94/20,228.70
  6. Step 6: Final answer
    x = 19,209.32

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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.