Home / 20,825.64-31,233.60-9,721.80

Finding the Fourth Proportional to 20,825.64, 31,233.60 and 9,721.80

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Solution

The fourth proportional to 20,825.64, 31,233.60 and 9,721.80 is: 14,580.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.64 : 31,233.60 = 9,721.80 : x
  2. Step 2: Convert to fraction form
    20,825.64/31,233.60 = 9,721.80/x
  3. Step 3: Cross multiply
    20,825.64x = 31,233.60 × 9,721.80
  4. Step 4: Simplify right side
    20,825.64x = 303,646,812.48
  5. Step 5: Solve for x
    x = 303,646,812.48/20,825.64
  6. Step 6: Final answer
    x = 14,580.43

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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.