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Finding the Fourth Proportional to 25,684.90, 38,520.43 and 9,891.99

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Solution

The fourth proportional to 25,684.90, 38,520.43 and 9,891.99 is: 14,835.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,684.90 : 38,520.43 = 9,891.99 : x
  2. Step 2: Convert to fraction form
    25,684.90/38,520.43 = 9,891.99/x
  3. Step 3: Cross multiply
    25,684.90x = 38,520.43 × 9,891.99
  4. Step 4: Simplify right side
    25,684.90x = 381,043,683.63
  5. Step 5: Solve for x
    x = 381,043,683.63/25,684.90
  6. Step 6: Final answer
    x = 14,835.32

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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.