Home / 20,370.97-28,109.46-11,416.56

Finding the Fourth Proportional to 20,370.97, 28,109.46 and 11,416.56

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Solution

The fourth proportional to 20,370.97, 28,109.46 and 11,416.56 is: 15,753.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.97 : 28,109.46 = 11,416.56 : x
  2. Step 2: Convert to fraction form
    20,370.97/28,109.46 = 11,416.56/x
  3. Step 3: Cross multiply
    20,370.97x = 28,109.46 × 11,416.56
  4. Step 4: Simplify right side
    20,370.97x = 320,913,336.66
  5. Step 5: Solve for x
    x = 320,913,336.66/20,370.97
  6. Step 6: Final answer
    x = 15,753.46

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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.