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Finding the Fourth Proportional to 19,698.18, 27,193.50 and 15,211.86

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Solution

The fourth proportional to 19,698.18, 27,193.50 and 15,211.86 is: 21,000.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,698.18 : 27,193.50 = 15,211.86 : x
  2. Step 2: Convert to fraction form
    19,698.18/27,193.50 = 15,211.86/x
  3. Step 3: Cross multiply
    19,698.18x = 27,193.50 × 15,211.86
  4. Step 4: Simplify right side
    19,698.18x = 413,663,714.91
  5. Step 5: Solve for x
    x = 413,663,714.91/19,698.18
  6. Step 6: Final answer
    x = 21,000.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.