Home / 20,385.96-28,132.26-11,433.45

Finding the Fourth Proportional to 20,385.96, 28,132.26 and 11,433.45

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Solution

The fourth proportional to 20,385.96, 28,132.26 and 11,433.45 is: 15,777.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.96 : 28,132.26 = 11,433.45 : x
  2. Step 2: Convert to fraction form
    20,385.96/28,132.26 = 11,433.45/x
  3. Step 3: Cross multiply
    20,385.96x = 28,132.26 × 11,433.45
  4. Step 4: Simplify right side
    20,385.96x = 321,648,788.10
  5. Step 5: Solve for x
    x = 321,648,788.10/20,385.96
  6. Step 6: Final answer
    x = 15,777.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.