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Finding the Fourth Proportional to 7,185.96, 9,915.30 and 4,041.48

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Solution

The fourth proportional to 7,185.96, 9,915.30 and 4,041.48 is: 5,576.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,185.96 : 9,915.30 = 4,041.48 : x
  2. Step 2: Convert to fraction form
    7,185.96/9,915.30 = 4,041.48/x
  3. Step 3: Cross multiply
    7,185.96x = 9,915.30 × 4,041.48
  4. Step 4: Simplify right side
    7,185.96x = 40,072,486.64
  5. Step 5: Solve for x
    x = 40,072,486.64/7,185.96
  6. Step 6: Final answer
    x = 5,576.50

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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.