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Finding the Fourth Proportional to 34,805.68, 48,009.99 and 20,648.50

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Solution

The fourth proportional to 34,805.68, 48,009.99 and 20,648.50 is: 28,481.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,805.68 : 48,009.99 = 20,648.50 : x
  2. Step 2: Convert to fraction form
    34,805.68/48,009.99 = 20,648.50/x
  3. Step 3: Cross multiply
    34,805.68x = 48,009.99 × 20,648.50
  4. Step 4: Simplify right side
    34,805.68x = 991,334,278.52
  5. Step 5: Solve for x
    x = 991,334,278.52/34,805.68
  6. Step 6: Final answer
    x = 28,481.97

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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.