Home / 28,380.44-39,126.84-19,871.12

Finding the Fourth Proportional to 28,380.44, 39,126.84 and 19,871.12

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Solution

The fourth proportional to 28,380.44, 39,126.84 and 19,871.12 is: 27,395.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.44 : 39,126.84 = 19,871.12 : x
  2. Step 2: Convert to fraction form
    28,380.44/39,126.84 = 19,871.12/x
  3. Step 3: Cross multiply
    28,380.44x = 39,126.84 × 19,871.12
  4. Step 4: Simplify right side
    28,380.44x = 777,494,132.86
  5. Step 5: Solve for x
    x = 777,494,132.86/28,380.44
  6. Step 6: Final answer
    x = 27,395.42

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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.