Home / 20,395.80-30,554.70-13,789.56

Finding the Fourth Proportional to 20,395.80, 30,554.70 and 13,789.56

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Solution

The fourth proportional to 20,395.80, 30,554.70 and 13,789.56 is: 20,657.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.80 : 30,554.70 = 13,789.56 : x
  2. Step 2: Convert to fraction form
    20,395.80/30,554.70 = 13,789.56/x
  3. Step 3: Cross multiply
    20,395.80x = 30,554.70 × 13,789.56
  4. Step 4: Simplify right side
    20,395.80x = 421,335,868.93
  5. Step 5: Solve for x
    x = 421,335,868.93/20,395.80
  6. Step 6: Final answer
    x = 20,657.97

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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.