Home / 20,917.13-28,866.33-11,485.69

Finding the Fourth Proportional to 20,917.13, 28,866.33 and 11,485.69

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Solution

The fourth proportional to 20,917.13, 28,866.33 and 11,485.69 is: 15,850.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.13 : 28,866.33 = 11,485.69 : x
  2. Step 2: Convert to fraction form
    20,917.13/28,866.33 = 11,485.69/x
  3. Step 3: Cross multiply
    20,917.13x = 28,866.33 × 11,485.69
  4. Step 4: Simplify right side
    20,917.13x = 331,549,645.65
  5. Step 5: Solve for x
    x = 331,549,645.65/20,917.13
  6. Step 6: Final answer
    x = 15,850.63

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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.