Home / 20,357.17-28,092.32-11,405.21

Finding the Fourth Proportional to 20,357.17, 28,092.32 and 11,405.21

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Solution

The fourth proportional to 20,357.17, 28,092.32 and 11,405.21 is: 15,738.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.17 : 28,092.32 = 11,405.21 : x
  2. Step 2: Convert to fraction form
    20,357.17/28,092.32 = 11,405.21/x
  3. Step 3: Cross multiply
    20,357.17x = 28,092.32 × 11,405.21
  4. Step 4: Simplify right side
    20,357.17x = 320,398,654.27
  5. Step 5: Solve for x
    x = 320,398,654.27/20,357.17
  6. Step 6: Final answer
    x = 15,738.86

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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.