Home / 21,238.38-31,861.41-8,751.45

Finding the Fourth Proportional to 21,238.38, 31,861.41 and 8,751.45

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Solution

The fourth proportional to 21,238.38, 31,861.41 and 8,751.45 is: 13,128.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,238.38 : 31,861.41 = 8,751.45 : x
  2. Step 2: Convert to fraction form
    21,238.38/31,861.41 = 8,751.45/x
  3. Step 3: Cross multiply
    21,238.38x = 31,861.41 × 8,751.45
  4. Step 4: Simplify right side
    21,238.38x = 278,833,536.54
  5. Step 5: Solve for x
    x = 278,833,536.54/21,238.38
  6. Step 6: Final answer
    x = 13,128.76

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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.