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Finding the Fourth Proportional to 18,681.64, 25,780.17 and 10,183.93

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Solution

The fourth proportional to 18,681.64, 25,780.17 and 10,183.93 is: 14,053.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.64 : 25,780.17 = 10,183.93 : x
  2. Step 2: Convert to fraction form
    18,681.64/25,780.17 = 10,183.93/x
  3. Step 3: Cross multiply
    18,681.64x = 25,780.17 × 10,183.93
  4. Step 4: Simplify right side
    18,681.64x = 262,543,420.41
  5. Step 5: Solve for x
    x = 262,543,420.41/18,681.64
  6. Step 6: Final answer
    x = 14,053.56

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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.