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Finding the Fourth Proportional to 25,855.97, 38,787.62 and 8,321.72

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Solution

The fourth proportional to 25,855.97, 38,787.62 and 8,321.72 is: 12,483.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,855.97 : 38,787.62 = 8,321.72 : x
  2. Step 2: Convert to fraction form
    25,855.97/38,787.62 = 8,321.72/x
  3. Step 3: Cross multiply
    25,855.97x = 38,787.62 × 8,321.72
  4. Step 4: Simplify right side
    25,855.97x = 322,779,477.56
  5. Step 5: Solve for x
    x = 322,779,477.56/25,855.97
  6. Step 6: Final answer
    x = 12,483.75

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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.