Home / 21,304.75-31,985.40-18,204.67

Finding the Fourth Proportional to 21,304.75, 31,985.40 and 18,204.67

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Solution

The fourth proportional to 21,304.75, 31,985.40 and 18,204.67 is: 27,331.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,304.75 : 31,985.40 = 18,204.67 : x
  2. Step 2: Convert to fraction form
    21,304.75/31,985.40 = 18,204.67/x
  3. Step 3: Cross multiply
    21,304.75x = 31,985.40 × 18,204.67
  4. Step 4: Simplify right side
    21,304.75x = 582,283,651.82
  5. Step 5: Solve for x
    x = 582,283,651.82/21,304.75
  6. Step 6: Final answer
    x = 27,331.17

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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.