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Finding the Fourth Proportional to 18,613.80, 25,681.25 and 10,654.54

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Solution

The fourth proportional to 18,613.80, 25,681.25 and 10,654.54 is: 14,699.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,613.80 : 25,681.25 = 10,654.54 : x
  2. Step 2: Convert to fraction form
    18,613.80/25,681.25 = 10,654.54/x
  3. Step 3: Cross multiply
    18,613.80x = 25,681.25 × 10,654.54
  4. Step 4: Simplify right side
    18,613.80x = 273,621,867.81
  5. Step 5: Solve for x
    x = 273,621,867.81/18,613.80
  6. Step 6: Final answer
    x = 14,699.95

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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.