Home / 12,190.84-18,286.89-3,871.51

Finding the Fourth Proportional to 12,190.84, 18,286.89 and 3,871.51

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Solution

The fourth proportional to 12,190.84, 18,286.89 and 3,871.51 is: 5,807.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.84 : 18,286.89 = 3,871.51 : x
  2. Step 2: Convert to fraction form
    12,190.84/18,286.89 = 3,871.51/x
  3. Step 3: Cross multiply
    12,190.84x = 18,286.89 × 3,871.51
  4. Step 4: Simplify right side
    12,190.84x = 70,797,877.50
  5. Step 5: Solve for x
    x = 70,797,877.50/12,190.84
  6. Step 6: Final answer
    x = 5,807.47

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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.