Home / 12,215.12-18,320.61-3,447.98

Finding the Fourth Proportional to 12,215.12, 18,320.61 and 3,447.98

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Solution

The fourth proportional to 12,215.12, 18,320.61 and 3,447.98 is: 5,171.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.12 : 18,320.61 = 3,447.98 : x
  2. Step 2: Convert to fraction form
    12,215.12/18,320.61 = 3,447.98/x
  3. Step 3: Cross multiply
    12,215.12x = 18,320.61 × 3,447.98
  4. Step 4: Simplify right side
    12,215.12x = 63,169,096.87
  5. Step 5: Solve for x
    x = 63,169,096.87/12,215.12
  6. Step 6: Final answer
    x = 5,171.39

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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.