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Finding the Fourth Proportional to 19,861.48, 29,783.14 and 11,859.88

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Solution

The fourth proportional to 19,861.48, 29,783.14 and 11,859.88 is: 17,784.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,861.48 : 29,783.14 = 11,859.88 : x
  2. Step 2: Convert to fraction form
    19,861.48/29,783.14 = 11,859.88/x
  3. Step 3: Cross multiply
    19,861.48x = 29,783.14 × 11,859.88
  4. Step 4: Simplify right side
    19,861.48x = 353,224,466.42
  5. Step 5: Solve for x
    x = 353,224,466.42/19,861.48
  6. Step 6: Final answer
    x = 17,784.40

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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.