Home / 20,378.13-28,126.49-11,999.49

Finding the Fourth Proportional to 20,378.13, 28,126.49 and 11,999.49

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Solution

The fourth proportional to 20,378.13, 28,126.49 and 11,999.49 is: 16,562.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.13 : 28,126.49 = 11,999.49 : x
  2. Step 2: Convert to fraction form
    20,378.13/28,126.49 = 11,999.49/x
  3. Step 3: Cross multiply
    20,378.13x = 28,126.49 × 11,999.49
  4. Step 4: Simplify right side
    20,378.13x = 337,503,475.49
  5. Step 5: Solve for x
    x = 337,503,475.49/20,378.13
  6. Step 6: Final answer
    x = 16,562.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.