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Finding the Fourth Proportional to 19,166.56, 28,753.12 and 8,779.20

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Solution

The fourth proportional to 19,166.56, 28,753.12 and 8,779.20 is: 13,170.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,166.56 : 28,753.12 = 8,779.20 : x
  2. Step 2: Convert to fraction form
    19,166.56/28,753.12 = 8,779.20/x
  3. Step 3: Cross multiply
    19,166.56x = 28,753.12 × 8,779.20
  4. Step 4: Simplify right side
    19,166.56x = 252,429,391.10
  5. Step 5: Solve for x
    x = 252,429,391.10/19,166.56
  6. Step 6: Final answer
    x = 13,170.30

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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.