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Finding the Fourth Proportional to 18,707.80, 25,817.30 and 10,324.84

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Solution

The fourth proportional to 18,707.80, 25,817.30 and 10,324.84 is: 14,248.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707.80 : 25,817.30 = 10,324.84 : x
  2. Step 2: Convert to fraction form
    18,707.80/25,817.30 = 10,324.84/x
  3. Step 3: Cross multiply
    18,707.80x = 25,817.30 × 10,324.84
  4. Step 4: Simplify right side
    18,707.80x = 266,559,491.73
  5. Step 5: Solve for x
    x = 266,559,491.73/18,707.80
  6. Step 6: Final answer
    x = 14,248.58

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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.