Home / 21,296.35-31,903.58-11,907.90

Finding the Fourth Proportional to 21,296.35, 31,903.58 and 11,907.90

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Solution

The fourth proportional to 21,296.35, 31,903.58 and 11,907.90 is: 17,838.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,296.35 : 31,903.58 = 11,907.90 : x
  2. Step 2: Convert to fraction form
    21,296.35/31,903.58 = 11,907.90/x
  3. Step 3: Cross multiply
    21,296.35x = 31,903.58 × 11,907.90
  4. Step 4: Simplify right side
    21,296.35x = 379,904,670.05
  5. Step 5: Solve for x
    x = 379,904,670.05/21,296.35
  6. Step 6: Final answer
    x = 17,838.96

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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.