Home / 20,679.49-31,029.90-7,540.75

Finding the Fourth Proportional to 20,679.49, 31,029.90 and 7,540.75

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Solution

The fourth proportional to 20,679.49, 31,029.90 and 7,540.75 is: 11,315.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.49 : 31,029.90 = 7,540.75 : x
  2. Step 2: Convert to fraction form
    20,679.49/31,029.90 = 7,540.75/x
  3. Step 3: Cross multiply
    20,679.49x = 31,029.90 × 7,540.75
  4. Step 4: Simplify right side
    20,679.49x = 233,988,718.43
  5. Step 5: Solve for x
    x = 233,988,718.43/20,679.49
  6. Step 6: Final answer
    x = 11,315.01

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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.