Home / 36,021.12-49,719.60-20,917.20

Finding the Fourth Proportional to 36,021.12, 49,719.60 and 20,917.20

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Solution

The fourth proportional to 36,021.12, 49,719.60 and 20,917.20 is: 28,871.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,021.12 : 49,719.60 = 20,917.20 : x
  2. Step 2: Convert to fraction form
    36,021.12/49,719.60 = 20,917.20/x
  3. Step 3: Cross multiply
    36,021.12x = 49,719.60 × 20,917.20
  4. Step 4: Simplify right side
    36,021.12x = 1,039,994,817.12
  5. Step 5: Solve for x
    x = 1,039,994,817.12/36,021.12
  6. Step 6: Final answer
    x = 28,871.81

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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.