Home / 20,829.56-28,744.08-11,879.94

Finding the Fourth Proportional to 20,829.56, 28,744.08 and 11,879.94

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Solution

The fourth proportional to 20,829.56, 28,744.08 and 11,879.94 is: 16,393.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.56 : 28,744.08 = 11,879.94 : x
  2. Step 2: Convert to fraction form
    20,829.56/28,744.08 = 11,879.94/x
  3. Step 3: Cross multiply
    20,829.56x = 28,744.08 × 11,879.94
  4. Step 4: Simplify right side
    20,829.56x = 341,478,009.00
  5. Step 5: Solve for x
    x = 341,478,009.00/20,829.56
  6. Step 6: Final answer
    x = 16,393.91

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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.