Home / 20,133.92-27,775.70-12,961.26

Finding the Fourth Proportional to 20,133.92, 27,775.70 and 12,961.26

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Solution

The fourth proportional to 20,133.92, 27,775.70 and 12,961.26 is: 17,880.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,133.92 : 27,775.70 = 12,961.26 : x
  2. Step 2: Convert to fraction form
    20,133.92/27,775.70 = 12,961.26/x
  3. Step 3: Cross multiply
    20,133.92x = 27,775.70 × 12,961.26
  4. Step 4: Simplify right side
    20,133.92x = 360,008,004.58
  5. Step 5: Solve for x
    x = 360,008,004.58/20,133.92
  6. Step 6: Final answer
    x = 17,880.68

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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.