Home / 13,859.71-19,126.40-7,891.37

Finding the Fourth Proportional to 13,859.71, 19,126.40 and 7,891.37

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Solution

The fourth proportional to 13,859.71, 19,126.40 and 7,891.37 is: 10,890.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,859.71 : 19,126.40 = 7,891.37 : x
  2. Step 2: Convert to fraction form
    13,859.71/19,126.40 = 7,891.37/x
  3. Step 3: Cross multiply
    13,859.71x = 19,126.40 × 7,891.37
  4. Step 4: Simplify right side
    13,859.71x = 150,933,439.00
  5. Step 5: Solve for x
    x = 150,933,439.00/13,859.71
  6. Step 6: Final answer
    x = 10,890.08

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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.