Home / 28,086.42-38,759.49-15,511.38

Finding the Fourth Proportional to 28,086.42, 38,759.49 and 15,511.38

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Solution

The fourth proportional to 28,086.42, 38,759.49 and 15,511.38 is: 21,405.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,086.42 : 38,759.49 = 15,511.38 : x
  2. Step 2: Convert to fraction form
    28,086.42/38,759.49 = 15,511.38/x
  3. Step 3: Cross multiply
    28,086.42x = 38,759.49 × 15,511.38
  4. Step 4: Simplify right side
    28,086.42x = 601,213,178.00
  5. Step 5: Solve for x
    x = 601,213,178.00/28,086.42
  6. Step 6: Final answer
    x = 21,405.83

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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.