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Finding the Fourth Proportional to 9,813.71, 13,539.60 and 5,564.31

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Solution

The fourth proportional to 9,813.71, 13,539.60 and 5,564.31 is: 7,676.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,813.71 : 13,539.60 = 5,564.31 : x
  2. Step 2: Convert to fraction form
    9,813.71/13,539.60 = 5,564.31/x
  3. Step 3: Cross multiply
    9,813.71x = 13,539.60 × 5,564.31
  4. Step 4: Simplify right side
    9,813.71x = 75,338,531.68
  5. Step 5: Solve for x
    x = 75,338,531.68/9,813.71
  6. Step 6: Final answer
    x = 7,676.87

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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.