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Finding the Fourth Proportional to 18,984.90, 28,471.97 and 7,877.85

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Solution

The fourth proportional to 18,984.90, 28,471.97 and 7,877.85 is: 11,814.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.90 : 28,471.97 = 7,877.85 : x
  2. Step 2: Convert to fraction form
    18,984.90/28,471.97 = 7,877.85/x
  3. Step 3: Cross multiply
    18,984.90x = 28,471.97 × 7,877.85
  4. Step 4: Simplify right side
    18,984.90x = 224,297,908.86
  5. Step 5: Solve for x
    x = 224,297,908.86/18,984.90
  6. Step 6: Final answer
    x = 11,814.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.