Home / 20,102.15-27,708.99-15,846.31

Finding the Fourth Proportional to 20,102.15, 27,708.99 and 15,846.31

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Solution

The fourth proportional to 20,102.15, 27,708.99 and 15,846.31 is: 21,842.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.15 : 27,708.99 = 15,846.31 : x
  2. Step 2: Convert to fraction form
    20,102.15/27,708.99 = 15,846.31/x
  3. Step 3: Cross multiply
    20,102.15x = 27,708.99 × 15,846.31
  4. Step 4: Simplify right side
    20,102.15x = 439,085,245.33
  5. Step 5: Solve for x
    x = 439,085,245.33/20,102.15
  6. Step 6: Final answer
    x = 21,842.70

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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.