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Finding the Fourth Proportional to 19,618.88, 29,428.54 and 7,775.54

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Solution

The fourth proportional to 19,618.88, 29,428.54 and 7,775.54 is: 11,663.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,618.88 : 29,428.54 = 7,775.54 : x
  2. Step 2: Convert to fraction form
    19,618.88/29,428.54 = 7,775.54/x
  3. Step 3: Cross multiply
    19,618.88x = 29,428.54 × 7,775.54
  4. Step 4: Simplify right side
    19,618.88x = 228,822,789.91
  5. Step 5: Solve for x
    x = 228,822,789.91/19,618.88
  6. Step 6: Final answer
    x = 11,663.40

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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.