Home / 20,724.85-31,079.07-9,029.89

Finding the Fourth Proportional to 20,724.85, 31,079.07 and 9,029.89

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Solution

The fourth proportional to 20,724.85, 31,079.07 and 9,029.89 is: 13,541.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.85 : 31,079.07 = 9,029.89 : x
  2. Step 2: Convert to fraction form
    20,724.85/31,079.07 = 9,029.89/x
  3. Step 3: Cross multiply
    20,724.85x = 31,079.07 × 9,029.89
  4. Step 4: Simplify right side
    20,724.85x = 280,640,583.40
  5. Step 5: Solve for x
    x = 280,640,583.40/20,724.85
  6. Step 6: Final answer
    x = 13,541.26

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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.