Home / 20,778.97-28,675.47-11,347.60

Finding the Fourth Proportional to 20,778.97, 28,675.47 and 11,347.60

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Solution

The fourth proportional to 20,778.97, 28,675.47 and 11,347.60 is: 15,659.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.97 : 28,675.47 = 11,347.60 : x
  2. Step 2: Convert to fraction form
    20,778.97/28,675.47 = 11,347.60/x
  3. Step 3: Cross multiply
    20,778.97x = 28,675.47 × 11,347.60
  4. Step 4: Simplify right side
    20,778.97x = 325,397,763.37
  5. Step 5: Solve for x
    x = 325,397,763.37/20,778.97
  6. Step 6: Final answer
    x = 15,659.96

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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.