Home / 21,908.40-30,234.19-13,410.35

Finding the Fourth Proportional to 21,908.40, 30,234.19 and 13,410.35

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Solution

The fourth proportional to 21,908.40, 30,234.19 and 13,410.35 is: 18,506.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.40 : 30,234.19 = 13,410.35 : x
  2. Step 2: Convert to fraction form
    21,908.40/30,234.19 = 13,410.35/x
  3. Step 3: Cross multiply
    21,908.40x = 30,234.19 × 13,410.35
  4. Step 4: Simplify right side
    21,908.40x = 405,451,069.87
  5. Step 5: Solve for x
    x = 405,451,069.87/21,908.40
  6. Step 6: Final answer
    x = 18,506.65

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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.