Home / 28,440.56-39,247.92-15,865.36

Finding the Fourth Proportional to 28,440.56, 39,247.92 and 15,865.36

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Solution

The fourth proportional to 28,440.56, 39,247.92 and 15,865.36 is: 21,894.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,440.56 : 39,247.92 = 15,865.36 : x
  2. Step 2: Convert to fraction form
    28,440.56/39,247.92 = 15,865.36/x
  3. Step 3: Cross multiply
    28,440.56x = 39,247.92 × 15,865.36
  4. Step 4: Simplify right side
    28,440.56x = 622,682,380.05
  5. Step 5: Solve for x
    x = 622,682,380.05/28,440.56
  6. Step 6: Final answer
    x = 21,894.17

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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.