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Finding the Fourth Proportional to 18,777.94, 25,915.17 and 10,396.06

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Solution

The fourth proportional to 18,777.94, 25,915.17 and 10,396.06 is: 14,347.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.94 : 25,915.17 = 10,396.06 : x
  2. Step 2: Convert to fraction form
    18,777.94/25,915.17 = 10,396.06/x
  3. Step 3: Cross multiply
    18,777.94x = 25,915.17 × 10,396.06
  4. Step 4: Simplify right side
    18,777.94x = 269,415,636.43
  5. Step 5: Solve for x
    x = 269,415,636.43/18,777.94
  6. Step 6: Final answer
    x = 14,347.46

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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.