Home / 20,633.28-30,933.12-10,239.36

Finding the Fourth Proportional to 20,633.28, 30,933.12 and 10,239.36

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Solution

The fourth proportional to 20,633.28, 30,933.12 and 10,239.36 is: 15,350.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,633.28 : 30,933.12 = 10,239.36 : x
  2. Step 2: Convert to fraction form
    20,633.28/30,933.12 = 10,239.36/x
  3. Step 3: Cross multiply
    20,633.28x = 30,933.12 × 10,239.36
  4. Step 4: Simplify right side
    20,633.28x = 316,735,351.60
  5. Step 5: Solve for x
    x = 316,735,351.60/20,633.28
  6. Step 6: Final answer
    x = 15,350.70

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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.