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Finding the Fourth Proportional to 12,969.91, 19,425.69 and 9,091.63

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Solution

The fourth proportional to 12,969.91, 19,425.69 and 9,091.63 is: 13,616.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,969.91 : 19,425.69 = 9,091.63 : x
  2. Step 2: Convert to fraction form
    12,969.91/19,425.69 = 9,091.63/x
  3. Step 3: Cross multiply
    12,969.91x = 19,425.69 × 9,091.63
  4. Step 4: Simplify right side
    12,969.91x = 176,611,185.97
  5. Step 5: Solve for x
    x = 176,611,185.97/12,969.91
  6. Step 6: Final answer
    x = 13,616.99

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1.5x scale

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.