Home / 21,315.25-31,984.40-10,371.25

Finding the Fourth Proportional to 21,315.25, 31,984.40 and 10,371.25

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Solution

The fourth proportional to 21,315.25, 31,984.40 and 10,371.25 is: 15,562.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.25 : 31,984.40 = 10,371.25 : x
  2. Step 2: Convert to fraction form
    21,315.25/31,984.40 = 10,371.25/x
  3. Step 3: Cross multiply
    21,315.25x = 31,984.40 × 10,371.25
  4. Step 4: Simplify right side
    21,315.25x = 331,718,208.50
  5. Step 5: Solve for x
    x = 331,718,208.50/21,315.25
  6. Step 6: Final answer
    x = 15,562.48

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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.