Home / 14,286.40-21,431.66-5,405.09

Finding the Fourth Proportional to 14,286.40, 21,431.66 and 5,405.09

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Solution

The fourth proportional to 14,286.40, 21,431.66 and 5,405.09 is: 8,108.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,286.40 : 21,431.66 = 5,405.09 : x
  2. Step 2: Convert to fraction form
    14,286.40/21,431.66 = 5,405.09/x
  3. Step 3: Cross multiply
    14,286.40x = 21,431.66 × 5,405.09
  4. Step 4: Simplify right side
    14,286.40x = 115,839,916.97
  5. Step 5: Solve for x
    x = 115,839,916.97/14,286.40
  6. Step 6: Final answer
    x = 8,108.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.