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Finding the Fourth Proportional to 13,726.87, 18,944.58 and 7,679.31

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Solution

The fourth proportional to 13,726.87, 18,944.58 and 7,679.31 is: 10,598.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,726.87 : 18,944.58 = 7,679.31 : x
  2. Step 2: Convert to fraction form
    13,726.87/18,944.58 = 7,679.31/x
  3. Step 3: Cross multiply
    13,726.87x = 18,944.58 × 7,679.31
  4. Step 4: Simplify right side
    13,726.87x = 145,481,260.40
  5. Step 5: Solve for x
    x = 145,481,260.40/13,726.87
  6. Step 6: Final answer
    x = 10,598.29

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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.