Home / 20,659.89-28,511.09-11,229.06

Finding the Fourth Proportional to 20,659.89, 28,511.09 and 11,229.06

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Solution

The fourth proportional to 20,659.89, 28,511.09 and 11,229.06 is: 15,496.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.89 : 28,511.09 = 11,229.06 : x
  2. Step 2: Convert to fraction form
    20,659.89/28,511.09 = 11,229.06/x
  3. Step 3: Cross multiply
    20,659.89x = 28,511.09 × 11,229.06
  4. Step 4: Simplify right side
    20,659.89x = 320,152,740.28
  5. Step 5: Solve for x
    x = 320,152,740.28/20,659.89
  6. Step 6: Final answer
    x = 15,496.34

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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.