Home / 13,421.92-20,129.82-5,102.86

Finding the Fourth Proportional to 13,421.92, 20,129.82 and 5,102.86

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Solution

The fourth proportional to 13,421.92, 20,129.82 and 5,102.86 is: 7,653.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.92 : 20,129.82 = 5,102.86 : x
  2. Step 2: Convert to fraction form
    13,421.92/20,129.82 = 5,102.86/x
  3. Step 3: Cross multiply
    13,421.92x = 20,129.82 × 5,102.86
  4. Step 4: Simplify right side
    13,421.92x = 102,719,653.29
  5. Step 5: Solve for x
    x = 102,719,653.29/13,421.92
  6. Step 6: Final answer
    x = 7,653.13

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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.