Home / 20,112.06-30,128.85-13,165.50

Finding the Fourth Proportional to 20,112.06, 30,128.85 and 13,165.50

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Solution

The fourth proportional to 20,112.06, 30,128.85 and 13,165.50 is: 19,722.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.06 : 30,128.85 = 13,165.50 : x
  2. Step 2: Convert to fraction form
    20,112.06/30,128.85 = 13,165.50/x
  3. Step 3: Cross multiply
    20,112.06x = 30,128.85 × 13,165.50
  4. Step 4: Simplify right side
    20,112.06x = 396,661,374.68
  5. Step 5: Solve for x
    x = 396,661,374.68/20,112.06
  6. Step 6: Final answer
    x = 19,722.56

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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.