Home / 20,810.75-31,216.13-6,218.75

Finding the Fourth Proportional to 20,810.75, 31,216.13 and 6,218.75

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Solution

The fourth proportional to 20,810.75, 31,216.13 and 6,218.75 is: 9,328.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.75 : 31,216.13 = 6,218.75 : x
  2. Step 2: Convert to fraction form
    20,810.75/31,216.13 = 6,218.75/x
  3. Step 3: Cross multiply
    20,810.75x = 31,216.13 × 6,218.75
  4. Step 4: Simplify right side
    20,810.75x = 194,125,308.44
  5. Step 5: Solve for x
    x = 194,125,308.44/20,810.75
  6. Step 6: Final answer
    x = 9,328.13

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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.