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Finding the Fourth Proportional to 18,605.64, 25,675.76 and 10,647.68

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Solution

The fourth proportional to 18,605.64, 25,675.76 and 10,647.68 is: 14,693.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,605.64 : 25,675.76 = 10,647.68 : x
  2. Step 2: Convert to fraction form
    18,605.64/25,675.76 = 10,647.68/x
  3. Step 3: Cross multiply
    18,605.64x = 25,675.76 × 10,647.68
  4. Step 4: Simplify right side
    18,605.64x = 273,387,276.24
  5. Step 5: Solve for x
    x = 273,387,276.24/18,605.64
  6. Step 6: Final answer
    x = 14,693.79

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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.