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Finding the Fourth Proportional to 12,996.80, 17,935.63 and 7,028.51

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Solution

The fourth proportional to 12,996.80, 17,935.63 and 7,028.51 is: 9,699.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,996.80 : 17,935.63 = 7,028.51 : x
  2. Step 2: Convert to fraction form
    12,996.80/17,935.63 = 7,028.51/x
  3. Step 3: Cross multiply
    12,996.80x = 17,935.63 × 7,028.51
  4. Step 4: Simplify right side
    12,996.80x = 126,060,799.65
  5. Step 5: Solve for x
    x = 126,060,799.65/12,996.80
  6. Step 6: Final answer
    x = 9,699.37

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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.