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Finding the Fourth Proportional to 13,316.96, 18,378.44 and 7,653.68

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Solution

The fourth proportional to 13,316.96, 18,378.44 and 7,653.68 is: 10,562.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,316.96 : 18,378.44 = 7,653.68 : x
  2. Step 2: Convert to fraction form
    13,316.96/18,378.44 = 7,653.68/x
  3. Step 3: Cross multiply
    13,316.96x = 18,378.44 × 7,653.68
  4. Step 4: Simplify right side
    13,316.96x = 140,662,754.17
  5. Step 5: Solve for x
    x = 140,662,754.17/13,316.96
  6. Step 6: Final answer
    x = 10,562.68

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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.