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Finding the Fourth Proportional to 15,061.92, 20,786.88 and 8,349.72

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Solution

The fourth proportional to 15,061.92, 20,786.88 and 8,349.72 is: 11,523.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,061.92 : 20,786.88 = 8,349.72 : x
  2. Step 2: Convert to fraction form
    15,061.92/20,786.88 = 8,349.72/x
  3. Step 3: Cross multiply
    15,061.92x = 20,786.88 × 8,349.72
  4. Step 4: Simplify right side
    15,061.92x = 173,564,627.67
  5. Step 5: Solve for x
    x = 173,564,627.67/15,061.92
  6. Step 6: Final answer
    x = 11,523.41

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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.