Home / 25,999.38-38,961.63-20,128.50

Finding the Fourth Proportional to 25,999.38, 38,961.63 and 20,128.50

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Solution

The fourth proportional to 25,999.38, 38,961.63 and 20,128.50 is: 30,163.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,999.38 : 38,961.63 = 20,128.50 : x
  2. Step 2: Convert to fraction form
    25,999.38/38,961.63 = 20,128.50/x
  3. Step 3: Cross multiply
    25,999.38x = 38,961.63 × 20,128.50
  4. Step 4: Simplify right side
    25,999.38x = 784,239,169.46
  5. Step 5: Solve for x
    x = 784,239,169.46/25,999.38
  6. Step 6: Final answer
    x = 30,163.76

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1.5x scale

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.