Home / 20,899.67-31,350.53-8,418.00

Finding the Fourth Proportional to 20,899.67, 31,350.53 and 8,418.00

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Solution

The fourth proportional to 20,899.67, 31,350.53 and 8,418.00 is: 12,627.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.67 : 31,350.53 = 8,418.00 : x
  2. Step 2: Convert to fraction form
    20,899.67/31,350.53 = 8,418.00/x
  3. Step 3: Cross multiply
    20,899.67x = 31,350.53 × 8,418.00
  4. Step 4: Simplify right side
    20,899.67x = 263,908,793.25
  5. Step 5: Solve for x
    x = 263,908,793.25/20,899.67
  6. Step 6: Final answer
    x = 12,627.42

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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.