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Finding the Fourth Proportional to 25,646.67, 38,475.68 and 7,879.79

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Solution

The fourth proportional to 25,646.67, 38,475.68 and 7,879.79 is: 11,821.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,646.67 : 38,475.68 = 7,879.79 : x
  2. Step 2: Convert to fraction form
    25,646.67/38,475.68 = 7,879.79/x
  3. Step 3: Cross multiply
    25,646.67x = 38,475.68 × 7,879.79
  4. Step 4: Simplify right side
    25,646.67x = 303,180,335.30
  5. Step 5: Solve for x
    x = 303,180,335.30/25,646.67
  6. Step 6: Final answer
    x = 11,821.43

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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.