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Finding the Fourth Proportional to 16,681.92, 25,029.96 and 7,317.12

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Solution

The fourth proportional to 16,681.92, 25,029.96 and 7,317.12 is: 10,978.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,681.92 : 25,029.96 = 7,317.12 : x
  2. Step 2: Convert to fraction form
    16,681.92/25,029.96 = 7,317.12/x
  3. Step 3: Cross multiply
    16,681.92x = 25,029.96 × 7,317.12
  4. Step 4: Simplify right side
    16,681.92x = 183,147,220.92
  5. Step 5: Solve for x
    x = 183,147,220.92/16,681.92
  6. Step 6: Final answer
    x = 10,978.79

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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.