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Finding the Fourth Proportional to 15,047.99, 20,761.12 and 8,674.38

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Solution

The fourth proportional to 15,047.99, 20,761.12 and 8,674.38 is: 11,967.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,047.99 : 20,761.12 = 8,674.38 : x
  2. Step 2: Convert to fraction form
    15,047.99/20,761.12 = 8,674.38/x
  3. Step 3: Cross multiply
    15,047.99x = 20,761.12 × 8,674.38
  4. Step 4: Simplify right side
    15,047.99x = 180,089,844.11
  5. Step 5: Solve for x
    x = 180,089,844.11/15,047.99
  6. Step 6: Final answer
    x = 11,967.70

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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.