Home / 13,421.10-20,125.40-4,981.73

Finding the Fourth Proportional to 13,421.10, 20,125.40 and 4,981.73

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Solution

The fourth proportional to 13,421.10, 20,125.40 and 4,981.73 is: 7,470.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.10 : 20,125.40 = 4,981.73 : x
  2. Step 2: Convert to fraction form
    13,421.10/20,125.40 = 4,981.73/x
  3. Step 3: Cross multiply
    13,421.10x = 20,125.40 × 4,981.73
  4. Step 4: Simplify right side
    13,421.10x = 100,259,183.41
  5. Step 5: Solve for x
    x = 100,259,183.41/13,421.10
  6. Step 6: Final answer
    x = 7,470.27

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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.