Home / 20,881.72-31,323.68-5,299.48

Finding the Fourth Proportional to 20,881.72, 31,323.68 and 5,299.48

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Solution

The fourth proportional to 20,881.72, 31,323.68 and 5,299.48 is: 7,949.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.72 : 31,323.68 = 5,299.48 : x
  2. Step 2: Convert to fraction form
    20,881.72/31,323.68 = 5,299.48/x
  3. Step 3: Cross multiply
    20,881.72x = 31,323.68 × 5,299.48
  4. Step 4: Simplify right side
    20,881.72x = 165,999,215.69
  5. Step 5: Solve for x
    x = 165,999,215.69/20,881.72
  6. Step 6: Final answer
    x = 7,949.50

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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.