Home / 20,933.39-28,871.37-13,770.66

Finding the Fourth Proportional to 20,933.39, 28,871.37 and 13,770.66

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Solution

The fourth proportional to 20,933.39, 28,871.37 and 13,770.66 is: 18,992.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.39 : 28,871.37 = 13,770.66 : x
  2. Step 2: Convert to fraction form
    20,933.39/28,871.37 = 13,770.66/x
  3. Step 3: Cross multiply
    20,933.39x = 28,871.37 × 13,770.66
  4. Step 4: Simplify right side
    20,933.39x = 397,577,820.00
  5. Step 5: Solve for x
    x = 397,577,820.00/20,933.39
  6. Step 6: Final answer
    x = 18,992.52

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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.