Home / 18,744.18-28,057.71-12,509.30

Finding the Fourth Proportional to 18,744.18, 28,057.71 and 12,509.30

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Solution

The fourth proportional to 18,744.18, 28,057.71 and 12,509.30 is: 18,724.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,744.18 : 28,057.71 = 12,509.30 : x
  2. Step 2: Convert to fraction form
    18,744.18/28,057.71 = 12,509.30/x
  3. Step 3: Cross multiply
    18,744.18x = 28,057.71 × 12,509.30
  4. Step 4: Simplify right side
    18,744.18x = 350,982,311.70
  5. Step 5: Solve for x
    x = 350,982,311.70/18,744.18
  6. Step 6: Final answer
    x = 18,724.87

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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.