Home / 13,859.82-19,126.57-7,891.49

Finding the Fourth Proportional to 13,859.82, 19,126.57 and 7,891.49

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Solution

The fourth proportional to 13,859.82, 19,126.57 and 7,891.49 is: 10,890.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,859.82 : 19,126.57 = 7,891.49 : x
  2. Step 2: Convert to fraction form
    13,859.82/19,126.57 = 7,891.49/x
  3. Step 3: Cross multiply
    13,859.82x = 19,126.57 × 7,891.49
  4. Step 4: Simplify right side
    13,859.82x = 150,937,135.89
  5. Step 5: Solve for x
    x = 150,937,135.89/13,859.82
  6. Step 6: Final answer
    x = 10,890.27

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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.