Home / 21,202.28-31,805.22-5,619.72

Finding the Fourth Proportional to 21,202.28, 31,805.22 and 5,619.72

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Solution

The fourth proportional to 21,202.28, 31,805.22 and 5,619.72 is: 8,430.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,202.28 : 31,805.22 = 5,619.72 : x
  2. Step 2: Convert to fraction form
    21,202.28/31,805.22 = 5,619.72/x
  3. Step 3: Cross multiply
    21,202.28x = 31,805.22 × 5,619.72
  4. Step 4: Simplify right side
    21,202.28x = 178,736,430.94
  5. Step 5: Solve for x
    x = 178,736,430.94/21,202.28
  6. Step 6: Final answer
    x = 8,430.06

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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.