Home / 12,186.81-18,280.89-3,422.43

Finding the Fourth Proportional to 12,186.81, 18,280.89 and 3,422.43

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Solution

The fourth proportional to 12,186.81, 18,280.89 and 3,422.43 is: 5,133.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,186.81 : 18,280.89 = 3,422.43 : x
  2. Step 2: Convert to fraction form
    12,186.81/18,280.89 = 3,422.43/x
  3. Step 3: Cross multiply
    12,186.81x = 18,280.89 × 3,422.43
  4. Step 4: Simplify right side
    12,186.81x = 62,565,066.36
  5. Step 5: Solve for x
    x = 62,565,066.36/12,186.81
  6. Step 6: Final answer
    x = 5,133.83

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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.