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Finding the Fourth Proportional to 18,348.76, 25,320.90 and 9,965.26

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Solution

The fourth proportional to 18,348.76, 25,320.90 and 9,965.26 is: 13,751.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,348.76 : 25,320.90 = 9,965.26 : x
  2. Step 2: Convert to fraction form
    18,348.76/25,320.90 = 9,965.26/x
  3. Step 3: Cross multiply
    18,348.76x = 25,320.90 × 9,965.26
  4. Step 4: Simplify right side
    18,348.76x = 252,329,351.93
  5. Step 5: Solve for x
    x = 252,329,351.93/18,348.76
  6. Step 6: Final answer
    x = 13,751.85

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Half scale
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Double scale
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Similar ratio
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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.