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Finding the Fourth Proportional to 19,945, 29,917.50 and 5,353

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Solution

The fourth proportional to 19,945, 29,917.50 and 5,353 is: 8,029.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,945 : 29,917.50 = 5,353 : x
  2. Step 2: Convert to fraction form
    19,945/29,917.50 = 5,353/x
  3. Step 3: Cross multiply
    19,945x = 29,917.50 × 5,353
  4. Step 4: Simplify right side
    19,945x = 160,148,377.50
  5. Step 5: Solve for x
    x = 160,148,377.50/19,945
  6. Step 6: Final answer
    x = 8,029.50

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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.