Home / 20,961.96-31,443.34-16,782.56

Finding the Fourth Proportional to 20,961.96, 31,443.34 and 16,782.56

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Solution

The fourth proportional to 20,961.96, 31,443.34 and 16,782.56 is: 25,174.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.96 : 31,443.34 = 16,782.56 : x
  2. Step 2: Convert to fraction form
    20,961.96/31,443.34 = 16,782.56/x
  3. Step 3: Cross multiply
    20,961.96x = 31,443.34 × 16,782.56
  4. Step 4: Simplify right side
    20,961.96x = 527,699,740.15
  5. Step 5: Solve for x
    x = 527,699,740.15/20,961.96
  6. Step 6: Final answer
    x = 25,174.16

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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.