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Finding the Fourth Proportional to 17,805.96, 26,718.23 and 12,915.96

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Solution

The fourth proportional to 17,805.96, 26,718.23 and 12,915.96 is: 19,380.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,805.96 : 26,718.23 = 12,915.96 : x
  2. Step 2: Convert to fraction form
    17,805.96/26,718.23 = 12,915.96/x
  3. Step 3: Cross multiply
    17,805.96x = 26,718.23 × 12,915.96
  4. Step 4: Simplify right side
    17,805.96x = 345,091,525.37
  5. Step 5: Solve for x
    x = 345,091,525.37/17,805.96
  6. Step 6: Final answer
    x = 19,380.68

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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.