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Finding the Fourth Proportional to 12,696.21, 17,520.75 and 7,107.21

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Solution

The fourth proportional to 12,696.21, 17,520.75 and 7,107.21 is: 9,807.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,696.21 : 17,520.75 = 7,107.21 : x
  2. Step 2: Convert to fraction form
    12,696.21/17,520.75 = 7,107.21/x
  3. Step 3: Cross multiply
    12,696.21x = 17,520.75 × 7,107.21
  4. Step 4: Simplify right side
    12,696.21x = 124,523,649.61
  5. Step 5: Solve for x
    x = 124,523,649.61/12,696.21
  6. Step 6: Final answer
    x = 9,807.94

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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.