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Finding the Fourth Proportional to 18,615.53, 25,715.58 and 16,933.97

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Solution

The fourth proportional to 18,615.53, 25,715.58 and 16,933.97 is: 23,392.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.53 : 25,715.58 = 16,933.97 : x
  2. Step 2: Convert to fraction form
    18,615.53/25,715.58 = 16,933.97/x
  3. Step 3: Cross multiply
    18,615.53x = 25,715.58 × 16,933.97
  4. Step 4: Simplify right side
    18,615.53x = 435,466,860.25
  5. Step 5: Solve for x
    x = 435,466,860.25/18,615.53
  6. Step 6: Final answer
    x = 23,392.67

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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.