Home / 21,316.80-31,984.40-11,444.54

Finding the Fourth Proportional to 21,316.80, 31,984.40 and 11,444.54

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Solution

The fourth proportional to 21,316.80, 31,984.40 and 11,444.54 is: 17,171.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316.80 : 31,984.40 = 11,444.54 : x
  2. Step 2: Convert to fraction form
    21,316.80/31,984.40 = 11,444.54/x
  3. Step 3: Cross multiply
    21,316.80x = 31,984.40 × 11,444.54
  4. Step 4: Simplify right side
    21,316.80x = 366,046,745.18
  5. Step 5: Solve for x
    x = 366,046,745.18/21,316.80
  6. Step 6: Final answer
    x = 17,171.75

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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.