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Finding the Fourth Proportional to 25,855, 38,782.50 and 8,326.60

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Solution

The fourth proportional to 25,855, 38,782.50 and 8,326.60 is: 12,489.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,855 : 38,782.50 = 8,326.60 : x
  2. Step 2: Convert to fraction form
    25,855/38,782.50 = 8,326.60/x
  3. Step 3: Cross multiply
    25,855x = 38,782.50 × 8,326.60
  4. Step 4: Simplify right side
    25,855x = 322,926,364.50
  5. Step 5: Solve for x
    x = 322,926,364.50/25,855
  6. Step 6: Final answer
    x = 12,489.90

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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.