Home / 13,726.14-18,947.97-9,900.78

Finding the Fourth Proportional to 13,726.14, 18,947.97 and 9,900.78

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Solution

The fourth proportional to 13,726.14, 18,947.97 and 9,900.78 is: 13,667.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,726.14 : 18,947.97 = 9,900.78 : x
  2. Step 2: Convert to fraction form
    13,726.14/18,947.97 = 9,900.78/x
  3. Step 3: Cross multiply
    13,726.14x = 18,947.97 × 9,900.78
  4. Step 4: Simplify right side
    13,726.14x = 187,599,682.42
  5. Step 5: Solve for x
    x = 187,599,682.42/13,726.14
  6. Step 6: Final answer
    x = 13,667.33

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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.