Home / 18,750.45-28,139.31-13,833.30

Finding the Fourth Proportional to 18,750.45, 28,139.31 and 13,833.30

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Solution

The fourth proportional to 18,750.45, 28,139.31 and 13,833.30 is: 20,760.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.45 : 28,139.31 = 13,833.30 : x
  2. Step 2: Convert to fraction form
    18,750.45/28,139.31 = 13,833.30/x
  3. Step 3: Cross multiply
    18,750.45x = 28,139.31 × 13,833.30
  4. Step 4: Simplify right side
    18,750.45x = 389,259,517.02
  5. Step 5: Solve for x
    x = 389,259,517.02/18,750.45
  6. Step 6: Final answer
    x = 20,760.01

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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.