Home / 13,579.11-20,371.77-5,259.20

Finding the Fourth Proportional to 13,579.11, 20,371.77 and 5,259.20

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Solution

The fourth proportional to 13,579.11, 20,371.77 and 5,259.20 is: 7,890.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.11 : 20,371.77 = 5,259.20 : x
  2. Step 2: Convert to fraction form
    13,579.11/20,371.77 = 5,259.20/x
  3. Step 3: Cross multiply
    13,579.11x = 20,371.77 × 5,259.20
  4. Step 4: Simplify right side
    13,579.11x = 107,139,110.93
  5. Step 5: Solve for x
    x = 107,139,110.93/13,579.11
  6. Step 6: Final answer
    x = 7,890.00

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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.