Home / 13,918.50-20,881.20-4,057.86

Finding the Fourth Proportional to 13,918.50, 20,881.20 and 4,057.86

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Solution

The fourth proportional to 13,918.50, 20,881.20 and 4,057.86 is: 6,087.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,918.50 : 20,881.20 = 4,057.86 : x
  2. Step 2: Convert to fraction form
    13,918.50/20,881.20 = 4,057.86/x
  3. Step 3: Cross multiply
    13,918.50x = 20,881.20 × 4,057.86
  4. Step 4: Simplify right side
    13,918.50x = 84,732,986.23
  5. Step 5: Solve for x
    x = 84,732,986.23/13,918.50
  6. Step 6: Final answer
    x = 6,087.80

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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.