Home / 20,847.14-28,768.98-11,415.64

Finding the Fourth Proportional to 20,847.14, 28,768.98 and 11,415.64

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Solution

The fourth proportional to 20,847.14, 28,768.98 and 11,415.64 is: 15,753.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.14 : 28,768.98 = 11,415.64 : x
  2. Step 2: Convert to fraction form
    20,847.14/28,768.98 = 11,415.64/x
  3. Step 3: Cross multiply
    20,847.14x = 28,768.98 × 11,415.64
  4. Step 4: Simplify right side
    20,847.14x = 328,416,318.85
  5. Step 5: Solve for x
    x = 328,416,318.85/20,847.14
  6. Step 6: Final answer
    x = 15,753.54

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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.