Home / 13,156.97-19,739.70-7,891.16

Finding the Fourth Proportional to 13,156.97, 19,739.70 and 7,891.16

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Solution

The fourth proportional to 13,156.97, 19,739.70 and 7,891.16 is: 11,839.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.97 : 19,739.70 = 7,891.16 : x
  2. Step 2: Convert to fraction form
    13,156.97/19,739.70 = 7,891.16/x
  3. Step 3: Cross multiply
    13,156.97x = 19,739.70 × 7,891.16
  4. Step 4: Simplify right side
    13,156.97x = 155,769,032.35
  5. Step 5: Solve for x
    x = 155,769,032.35/13,156.97
  6. Step 6: Final answer
    x = 11,839.28

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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.