Home / 21,087.84-31,633.11-7,764.42

Finding the Fourth Proportional to 21,087.84, 31,633.11 and 7,764.42

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Solution

The fourth proportional to 21,087.84, 31,633.11 and 7,764.42 is: 11,647.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.84 : 31,633.11 = 7,764.42 : x
  2. Step 2: Convert to fraction form
    21,087.84/31,633.11 = 7,764.42/x
  3. Step 3: Cross multiply
    21,087.84x = 31,633.11 × 7,764.42
  4. Step 4: Simplify right side
    21,087.84x = 245,612,751.95
  5. Step 5: Solve for x
    x = 245,612,751.95/21,087.84
  6. Step 6: Final answer
    x = 11,647.13

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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.