Home / 12,216.88-18,318.12-4,315.60

Finding the Fourth Proportional to 12,216.88, 18,318.12 and 4,315.60

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Solution

The fourth proportional to 12,216.88, 18,318.12 and 4,315.60 is: 6,470.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,216.88 : 18,318.12 = 4,315.60 : x
  2. Step 2: Convert to fraction form
    12,216.88/18,318.12 = 4,315.60/x
  3. Step 3: Cross multiply
    12,216.88x = 18,318.12 × 4,315.60
  4. Step 4: Simplify right side
    12,216.88x = 79,053,678.67
  5. Step 5: Solve for x
    x = 79,053,678.67/12,216.88
  6. Step 6: Final answer
    x = 6,470.86

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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.