Home / 13,720.79-20,581.09-3,860.00

Finding the Fourth Proportional to 13,720.79, 20,581.09 and 3,860.00

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Solution

The fourth proportional to 13,720.79, 20,581.09 and 3,860.00 is: 5,789.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.79 : 20,581.09 = 3,860.00 : x
  2. Step 2: Convert to fraction form
    13,720.79/20,581.09 = 3,860.00/x
  3. Step 3: Cross multiply
    13,720.79x = 20,581.09 × 3,860.00
  4. Step 4: Simplify right side
    13,720.79x = 79,443,087.79
  5. Step 5: Solve for x
    x = 79,443,087.79/13,720.79
  6. Step 6: Final answer
    x = 5,789.98

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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.