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Finding the Fourth Proportional to 18,688, 25,791.26 and 10,304.50

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Solution

The fourth proportional to 18,688, 25,791.26 and 10,304.50 is: 14,221.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688 : 25,791.26 = 10,304.50 : x
  2. Step 2: Convert to fraction form
    18,688/25,791.26 = 10,304.50/x
  3. Step 3: Cross multiply
    18,688x = 25,791.26 × 10,304.50
  4. Step 4: Simplify right side
    18,688x = 265,766,038.67
  5. Step 5: Solve for x
    x = 265,766,038.67/18,688
  6. Step 6: Final answer
    x = 14,221.21

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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.