Home / 20,743.29-31,074.84-12,822.57

Finding the Fourth Proportional to 20,743.29, 31,074.84 and 12,822.57

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Solution

The fourth proportional to 20,743.29, 31,074.84 and 12,822.57 is: 19,209.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.29 : 31,074.84 = 12,822.57 : x
  2. Step 2: Convert to fraction form
    20,743.29/31,074.84 = 12,822.57/x
  3. Step 3: Cross multiply
    20,743.29x = 31,074.84 × 12,822.57
  4. Step 4: Simplify right side
    20,743.29x = 398,459,311.14
  5. Step 5: Solve for x
    x = 398,459,311.14/20,743.29
  6. Step 6: Final answer
    x = 19,209.07

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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.