Home / 20,821.11-28,742.51-13,277.58

Finding the Fourth Proportional to 20,821.11, 28,742.51 and 13,277.58

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Solution

The fourth proportional to 20,821.11, 28,742.51 and 13,277.58 is: 18,329.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.11 : 28,742.51 = 13,277.58 : x
  2. Step 2: Convert to fraction form
    20,821.11/28,742.51 = 13,277.58/x
  3. Step 3: Cross multiply
    20,821.11x = 28,742.51 × 13,277.58
  4. Step 4: Simplify right side
    20,821.11x = 381,630,909.54
  5. Step 5: Solve for x
    x = 381,630,909.54/20,821.11
  6. Step 6: Final answer
    x = 18,329.04

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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.