Home / 13,812.24-20,718.35-3,423.99

Finding the Fourth Proportional to 13,812.24, 20,718.35 and 3,423.99

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Solution

The fourth proportional to 13,812.24, 20,718.35 and 3,423.99 is: 5,135.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,812.24 : 20,718.35 = 3,423.99 : x
  2. Step 2: Convert to fraction form
    13,812.24/20,718.35 = 3,423.99/x
  3. Step 3: Cross multiply
    13,812.24x = 20,718.35 × 3,423.99
  4. Step 4: Simplify right side
    13,812.24x = 70,939,406.10
  5. Step 5: Solve for x
    x = 70,939,406.10/13,812.24
  6. Step 6: Final answer
    x = 5,135.98

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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.