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Finding the Fourth Proportional to 18,205.99, 25,119.34 and 10,654.19

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Solution

The fourth proportional to 18,205.99, 25,119.34 and 10,654.19 is: 14,699.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,205.99 : 25,119.34 = 10,654.19 : x
  2. Step 2: Convert to fraction form
    18,205.99/25,119.34 = 10,654.19/x
  3. Step 3: Cross multiply
    18,205.99x = 25,119.34 × 10,654.19
  4. Step 4: Simplify right side
    18,205.99x = 267,626,221.03
  5. Step 5: Solve for x
    x = 267,626,221.03/18,205.99
  6. Step 6: Final answer
    x = 14,699.90

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Half scale
Find fourth proportional to 36,411.98, 50,238.68 and 21,308.38
Double scale
Find fourth proportional to 18,206.99, 25,120.72 and 10,655.19
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.