Home / 20,865.97-28,795.13-11,305.88

Finding the Fourth Proportional to 20,865.97, 28,795.13 and 11,305.88

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Solution

The fourth proportional to 20,865.97, 28,795.13 and 11,305.88 is: 15,602.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.97 : 28,795.13 = 11,305.88 : x
  2. Step 2: Convert to fraction form
    20,865.97/28,795.13 = 11,305.88/x
  3. Step 3: Cross multiply
    20,865.97x = 28,795.13 × 11,305.88
  4. Step 4: Simplify right side
    20,865.97x = 325,554,234.24
  5. Step 5: Solve for x
    x = 325,554,234.24/20,865.97
  6. Step 6: Final answer
    x = 15,602.16

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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.