Home / 20,830.52-28,727.40-13,764.08

Finding the Fourth Proportional to 20,830.52, 28,727.40 and 13,764.08

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Solution

The fourth proportional to 20,830.52, 28,727.40 and 13,764.08 is: 18,982.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.52 : 28,727.40 = 13,764.08 : x
  2. Step 2: Convert to fraction form
    20,830.52/28,727.40 = 13,764.08/x
  3. Step 3: Cross multiply
    20,830.52x = 28,727.40 × 13,764.08
  4. Step 4: Simplify right side
    20,830.52x = 395,406,231.79
  5. Step 5: Solve for x
    x = 395,406,231.79/20,830.52
  6. Step 6: Final answer
    x = 18,982.06

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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.