Home / 20,822.87-28,732.15-11,870.54

Finding the Fourth Proportional to 20,822.87, 28,732.15 and 11,870.54

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Solution

The fourth proportional to 20,822.87, 28,732.15 and 11,870.54 is: 16,379.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.87 : 28,732.15 = 11,870.54 : x
  2. Step 2: Convert to fraction form
    20,822.87/28,732.15 = 11,870.54/x
  3. Step 3: Cross multiply
    20,822.87x = 28,732.15 × 11,870.54
  4. Step 4: Simplify right side
    20,822.87x = 341,066,135.86
  5. Step 5: Solve for x
    x = 341,066,135.86/20,822.87
  6. Step 6: Final answer
    x = 16,379.40

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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.