Home / 20,765.76-30,987.90-18,550.68

Finding the Fourth Proportional to 20,765.76, 30,987.90 and 18,550.68

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Solution

The fourth proportional to 20,765.76, 30,987.90 and 18,550.68 is: 27,682.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.76 : 30,987.90 = 18,550.68 : x
  2. Step 2: Convert to fraction form
    20,765.76/30,987.90 = 18,550.68/x
  3. Step 3: Cross multiply
    20,765.76x = 30,987.90 × 18,550.68
  4. Step 4: Simplify right side
    20,765.76x = 574,846,616.77
  5. Step 5: Solve for x
    x = 574,846,616.77/20,765.76
  6. Step 6: Final answer
    x = 27,682.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.