Home / 21,891.79-30,208.48-12,331.41

Finding the Fourth Proportional to 21,891.79, 30,208.48 and 12,331.41

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Solution

The fourth proportional to 21,891.79, 30,208.48 and 12,331.41 is: 17,016.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,891.79 : 30,208.48 = 12,331.41 : x
  2. Step 2: Convert to fraction form
    21,891.79/30,208.48 = 12,331.41/x
  3. Step 3: Cross multiply
    21,891.79x = 30,208.48 × 12,331.41
  4. Step 4: Simplify right side
    21,891.79x = 372,513,117.49
  5. Step 5: Solve for x
    x = 372,513,117.49/21,891.79
  6. Step 6: Final answer
    x = 17,016.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.