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Finding the Fourth Proportional to 30,993.59, 42,771.64 and 16,846.47

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Solution

The fourth proportional to 30,993.59, 42,771.64 and 16,846.47 is: 23,248.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,993.59 : 42,771.64 = 16,846.47 : x
  2. Step 2: Convert to fraction form
    30,993.59/42,771.64 = 16,846.47/x
  3. Step 3: Cross multiply
    30,993.59x = 42,771.64 × 16,846.47
  4. Step 4: Simplify right side
    30,993.59x = 720,551,150.11
  5. Step 5: Solve for x
    x = 720,551,150.11/30,993.59
  6. Step 6: Final answer
    x = 23,248.39

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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.