Home / 20,394.80-30,553.20-13,788.56

Finding the Fourth Proportional to 20,394.80, 30,553.20 and 13,788.56

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Solution

The fourth proportional to 20,394.80, 30,553.20 and 13,788.56 is: 20,656.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,394.80 : 30,553.20 = 13,788.56 : x
  2. Step 2: Convert to fraction form
    20,394.80/30,553.20 = 13,788.56/x
  3. Step 3: Cross multiply
    20,394.80x = 30,553.20 × 13,788.56
  4. Step 4: Simplify right side
    20,394.80x = 421,284,631.39
  5. Step 5: Solve for x
    x = 421,284,631.39/20,394.80
  6. Step 6: Final answer
    x = 20,656.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.