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Finding the Fourth Proportional to 18,766.98, 25,902.99 and 12,801.06

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Solution

The fourth proportional to 18,766.98, 25,902.99 and 12,801.06 is: 17,668.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,766.98 : 25,902.99 = 12,801.06 : x
  2. Step 2: Convert to fraction form
    18,766.98/25,902.99 = 12,801.06/x
  3. Step 3: Cross multiply
    18,766.98x = 25,902.99 × 12,801.06
  4. Step 4: Simplify right side
    18,766.98x = 331,585,729.17
  5. Step 5: Solve for x
    x = 331,585,729.17/18,766.98
  6. Step 6: Final answer
    x = 17,668.57

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1.5x scale

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.