Home / 20,806.24-31,217.24-12,492.06

Finding the Fourth Proportional to 20,806.24, 31,217.24 and 12,492.06

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Solution

The fourth proportional to 20,806.24, 31,217.24 and 12,492.06 is: 18,742.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.24 : 31,217.24 = 12,492.06 : x
  2. Step 2: Convert to fraction form
    20,806.24/31,217.24 = 12,492.06/x
  3. Step 3: Cross multiply
    20,806.24x = 31,217.24 × 12,492.06
  4. Step 4: Simplify right side
    20,806.24x = 389,967,635.11
  5. Step 5: Solve for x
    x = 389,967,635.11/20,806.24
  6. Step 6: Final answer
    x = 18,742.82

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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.