Home / 21,030.30-31,476.78-15,481.38

Finding the Fourth Proportional to 21,030.30, 31,476.78 and 15,481.38

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Solution

The fourth proportional to 21,030.30, 31,476.78 and 15,481.38 is: 23,171.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.30 : 31,476.78 = 15,481.38 : x
  2. Step 2: Convert to fraction form
    21,030.30/31,476.78 = 15,481.38/x
  3. Step 3: Cross multiply
    21,030.30x = 31,476.78 × 15,481.38
  4. Step 4: Simplify right side
    21,030.30x = 487,303,992.36
  5. Step 5: Solve for x
    x = 487,303,992.36/21,030.30
  6. Step 6: Final answer
    x = 23,171.52

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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.