Home / 20,169.11-30,257.51-7,688.09

Finding the Fourth Proportional to 20,169.11, 30,257.51 and 7,688.09

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Solution

The fourth proportional to 20,169.11, 30,257.51 and 7,688.09 is: 11,533.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,169.11 : 30,257.51 = 7,688.09 : x
  2. Step 2: Convert to fraction form
    20,169.11/30,257.51 = 7,688.09/x
  3. Step 3: Cross multiply
    20,169.11x = 30,257.51 × 7,688.09
  4. Step 4: Simplify right side
    20,169.11x = 232,622,460.06
  5. Step 5: Solve for x
    x = 232,622,460.06/20,169.11
  6. Step 6: Final answer
    x = 11,533.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.