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Finding the Fourth Proportional to 18,909.88, 28,367.70 and 9,041.08

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Solution

The fourth proportional to 18,909.88, 28,367.70 and 9,041.08 is: 13,563.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.88 : 28,367.70 = 9,041.08 : x
  2. Step 2: Convert to fraction form
    18,909.88/28,367.70 = 9,041.08/x
  3. Step 3: Cross multiply
    18,909.88x = 28,367.70 × 9,041.08
  4. Step 4: Simplify right side
    18,909.88x = 256,474,645.12
  5. Step 5: Solve for x
    x = 256,474,645.12/18,909.88
  6. Step 6: Final answer
    x = 13,563.00

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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.