Home / 13,861.49-19,127.79-7,891.97

Finding the Fourth Proportional to 13,861.49, 19,127.79 and 7,891.97

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Solution

The fourth proportional to 13,861.49, 19,127.79 and 7,891.97 is: 10,890.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,861.49 : 19,127.79 = 7,891.97 : x
  2. Step 2: Convert to fraction form
    13,861.49/19,127.79 = 7,891.97/x
  3. Step 3: Cross multiply
    13,861.49x = 19,127.79 × 7,891.97
  4. Step 4: Simplify right side
    13,861.49x = 150,955,944.85
  5. Step 5: Solve for x
    x = 150,955,944.85/13,861.49
  6. Step 6: Final answer
    x = 10,890.31

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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.