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Finding the Fourth Proportional to 20,698.88, 30,898.04 and 19,156.96

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Solution

The fourth proportional to 20,698.88, 30,898.04 and 19,156.96 is: 28,596.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.88 : 30,898.04 = 19,156.96 : x
  2. Step 2: Convert to fraction form
    20,698.88/30,898.04 = 19,156.96/x
  3. Step 3: Cross multiply
    20,698.88x = 30,898.04 × 19,156.96
  4. Step 4: Simplify right side
    20,698.88x = 591,912,516.36
  5. Step 5: Solve for x
    x = 591,912,516.36/20,698.88
  6. Step 6: Final answer
    x = 28,596.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.