Home / 14,108.85-21,144.71-7,871.80

Finding the Fourth Proportional to 14,108.85, 21,144.71 and 7,871.80

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Solution

The fourth proportional to 14,108.85, 21,144.71 and 7,871.80 is: 11,797.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,108.85 : 21,144.71 = 7,871.80 : x
  2. Step 2: Convert to fraction form
    14,108.85/21,144.71 = 7,871.80/x
  3. Step 3: Cross multiply
    14,108.85x = 21,144.71 × 7,871.80
  4. Step 4: Simplify right side
    14,108.85x = 166,446,928.18
  5. Step 5: Solve for x
    x = 166,446,928.18/14,108.85
  6. Step 6: Final answer
    x = 11,797.34

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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.