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Finding the Fourth Proportional to 9,713.21, 13,404.22 and 5,521.46

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Solution

The fourth proportional to 9,713.21, 13,404.22 and 5,521.46 is: 7,619.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,713.21 : 13,404.22 = 5,521.46 : x
  2. Step 2: Convert to fraction form
    9,713.21/13,404.22 = 5,521.46/x
  3. Step 3: Cross multiply
    9,713.21x = 13,404.22 × 5,521.46
  4. Step 4: Simplify right side
    9,713.21x = 74,010,783.74
  5. Step 5: Solve for x
    x = 74,010,783.74/9,713.21
  6. Step 6: Final answer
    x = 7,619.60

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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.