Home / 13,619.72-20,389.92-10,125.20

Finding the Fourth Proportional to 13,619.72, 20,389.92 and 10,125.20

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Solution

The fourth proportional to 13,619.72, 20,389.92 and 10,125.20 is: 15,158.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.72 : 20,389.92 = 10,125.20 : x
  2. Step 2: Convert to fraction form
    13,619.72/20,389.92 = 10,125.20/x
  3. Step 3: Cross multiply
    13,619.72x = 20,389.92 × 10,125.20
  4. Step 4: Simplify right side
    13,619.72x = 206,452,017.98
  5. Step 5: Solve for x
    x = 206,452,017.98/13,619.72
  6. Step 6: Final answer
    x = 15,158.32

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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.