Home / 18,945.34-28,415.46-13,705.42

Finding the Fourth Proportional to 18,945.34, 28,415.46 and 13,705.42

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Solution

The fourth proportional to 18,945.34, 28,415.46 and 13,705.42 is: 20,556.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,945.34 : 28,415.46 = 13,705.42 : x
  2. Step 2: Convert to fraction form
    18,945.34/28,415.46 = 13,705.42/x
  3. Step 3: Cross multiply
    18,945.34x = 28,415.46 × 13,705.42
  4. Step 4: Simplify right side
    18,945.34x = 389,445,813.79
  5. Step 5: Solve for x
    x = 389,445,813.79/18,945.34
  6. Step 6: Final answer
    x = 20,556.29

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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.