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Finding the Fourth Proportional to 18,776.84, 25,915.22 and 10,823.69

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Solution

The fourth proportional to 18,776.84, 25,915.22 and 10,823.69 is: 14,938.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776.84 : 25,915.22 = 10,823.69 : x
  2. Step 2: Convert to fraction form
    18,776.84/25,915.22 = 10,823.69/x
  3. Step 3: Cross multiply
    18,776.84x = 25,915.22 × 10,823.69
  4. Step 4: Simplify right side
    18,776.84x = 280,498,123.87
  5. Step 5: Solve for x
    x = 280,498,123.87/18,776.84
  6. Step 6: Final answer
    x = 14,938.52

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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.