Home / 20,810.52-31,229.82-7,673.40

Finding the Fourth Proportional to 20,810.52, 31,229.82 and 7,673.40

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Solution

The fourth proportional to 20,810.52, 31,229.82 and 7,673.40 is: 11,515.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.52 : 31,229.82 = 7,673.40 : x
  2. Step 2: Convert to fraction form
    20,810.52/31,229.82 = 7,673.40/x
  3. Step 3: Cross multiply
    20,810.52x = 31,229.82 × 7,673.40
  4. Step 4: Simplify right side
    20,810.52x = 239,638,900.79
  5. Step 5: Solve for x
    x = 239,638,900.79/20,810.52
  6. Step 6: Final answer
    x = 11,515.28

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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.