Home / 20,911.68-28,858.24-11,480.32

Finding the Fourth Proportional to 20,911.68, 28,858.24 and 11,480.32

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Solution

The fourth proportional to 20,911.68, 28,858.24 and 11,480.32 is: 15,842.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.68 : 28,858.24 = 11,480.32 : x
  2. Step 2: Convert to fraction form
    20,911.68/28,858.24 = 11,480.32/x
  3. Step 3: Cross multiply
    20,911.68x = 28,858.24 × 11,480.32
  4. Step 4: Simplify right side
    20,911.68x = 331,301,829.84
  5. Step 5: Solve for x
    x = 331,301,829.84/20,911.68
  6. Step 6: Final answer
    x = 15,842.91

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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.