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Finding the Fourth Proportional to 65,663.46, 98,511.39 and 18,915.93

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Solution

The fourth proportional to 65,663.46, 98,511.39 and 18,915.93 is: 28,378.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,663.46 : 98,511.39 = 18,915.93 : x
  2. Step 2: Convert to fraction form
    65,663.46/98,511.39 = 18,915.93/x
  3. Step 3: Cross multiply
    65,663.46x = 98,511.39 × 18,915.93
  4. Step 4: Simplify right side
    65,663.46x = 1,863,434,557.44
  5. Step 5: Solve for x
    x = 1,863,434,557.44/65,663.46
  6. Step 6: Final answer
    x = 28,378.56

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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.