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Finding the Fourth Proportional to 19,103.80, 28,655.70 and 11,308.60

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Solution

The fourth proportional to 19,103.80, 28,655.70 and 11,308.60 is: 16,962.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,103.80 : 28,655.70 = 11,308.60 : x
  2. Step 2: Convert to fraction form
    19,103.80/28,655.70 = 11,308.60/x
  3. Step 3: Cross multiply
    19,103.80x = 28,655.70 × 11,308.60
  4. Step 4: Simplify right side
    19,103.80x = 324,055,849.02
  5. Step 5: Solve for x
    x = 324,055,849.02/19,103.80
  6. Step 6: Final answer
    x = 16,962.90

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Similar ratio
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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.