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Finding the Fourth Proportional to 21,295.98, 31,903.03 and 11,907.53

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Solution

The fourth proportional to 21,295.98, 31,903.03 and 11,907.53 is: 17,838.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,295.98 : 31,903.03 = 11,907.53 : x
  2. Step 2: Convert to fraction form
    21,295.98/31,903.03 = 11,907.53/x
  3. Step 3: Cross multiply
    21,295.98x = 31,903.03 × 11,907.53
  4. Step 4: Simplify right side
    21,295.98x = 379,886,097.53
  5. Step 5: Solve for x
    x = 379,886,097.53/21,295.98
  6. Step 6: Final answer
    x = 17,838.39

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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.