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Finding the Fourth Proportional to 13,761.50, 18,998.73 and 9,059.45

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Solution

The fourth proportional to 13,761.50, 18,998.73 and 9,059.45 is: 12,507.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,761.50 : 18,998.73 = 9,059.45 : x
  2. Step 2: Convert to fraction form
    13,761.50/18,998.73 = 9,059.45/x
  3. Step 3: Cross multiply
    13,761.50x = 18,998.73 × 9,059.45
  4. Step 4: Simplify right side
    13,761.50x = 172,117,949.50
  5. Step 5: Solve for x
    x = 172,117,949.50/13,761.50
  6. Step 6: Final answer
    x = 12,507.21

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1.5x scale

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.