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Finding the Fourth Proportional to 13,969.84, 19,287.48 and 8,672.44

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Solution

The fourth proportional to 13,969.84, 19,287.48 and 8,672.44 is: 11,973.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,969.84 : 19,287.48 = 8,672.44 : x
  2. Step 2: Convert to fraction form
    13,969.84/19,287.48 = 8,672.44/x
  3. Step 3: Cross multiply
    13,969.84x = 19,287.48 × 8,672.44
  4. Step 4: Simplify right side
    13,969.84x = 167,269,513.05
  5. Step 5: Solve for x
    x = 167,269,513.05/13,969.84
  6. Step 6: Final answer
    x = 11,973.62

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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.