Home / 20,839.52-28,739.80-13,773.08

Finding the Fourth Proportional to 20,839.52, 28,739.80 and 13,773.08

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Solution

The fourth proportional to 20,839.52, 28,739.80 and 13,773.08 is: 18,994.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.52 : 28,739.80 = 13,773.08 : x
  2. Step 2: Convert to fraction form
    20,839.52/28,739.80 = 13,773.08/x
  3. Step 3: Cross multiply
    20,839.52x = 28,739.80 × 13,773.08
  4. Step 4: Simplify right side
    20,839.52x = 395,835,564.58
  5. Step 5: Solve for x
    x = 395,835,564.58/20,839.52
  6. Step 6: Final answer
    x = 18,994.47

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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.