Home / 20,810.36-31,182.76-7,644.64

Finding the Fourth Proportional to 20,810.36, 31,182.76 and 7,644.64

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Solution

The fourth proportional to 20,810.36, 31,182.76 and 7,644.64 is: 11,454.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.36 : 31,182.76 = 7,644.64 : x
  2. Step 2: Convert to fraction form
    20,810.36/31,182.76 = 7,644.64/x
  3. Step 3: Cross multiply
    20,810.36x = 31,182.76 × 7,644.64
  4. Step 4: Simplify right side
    20,810.36x = 238,380,974.41
  5. Step 5: Solve for x
    x = 238,380,974.41/20,810.36
  6. Step 6: Final answer
    x = 11,454.92

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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.