Home / 20,922.96-28,873.42-11,490.92

Finding the Fourth Proportional to 20,922.96, 28,873.42 and 11,490.92

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Solution

The fourth proportional to 20,922.96, 28,873.42 and 11,490.92 is: 15,857.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.96 : 28,873.42 = 11,490.92 : x
  2. Step 2: Convert to fraction form
    20,922.96/28,873.42 = 11,490.92/x
  3. Step 3: Cross multiply
    20,922.96x = 28,873.42 × 11,490.92
  4. Step 4: Simplify right side
    20,922.96x = 331,781,986.25
  5. Step 5: Solve for x
    x = 331,781,986.25/20,922.96
  6. Step 6: Final answer
    x = 15,857.32

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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.