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Finding the Fourth Proportional to 18,815, 28,317.01 and 14,159.12

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Solution

The fourth proportional to 18,815, 28,317.01 and 14,159.12 is: 21,309.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815 : 28,317.01 = 14,159.12 : x
  2. Step 2: Convert to fraction form
    18,815/28,317.01 = 14,159.12/x
  3. Step 3: Cross multiply
    18,815x = 28,317.01 × 14,159.12
  4. Step 4: Simplify right side
    18,815x = 400,943,871.84
  5. Step 5: Solve for x
    x = 400,943,871.84/18,815
  6. Step 6: Final answer
    x = 21,309.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.