Home / 12,390.90-18,584.55-3,624.90

Finding the Fourth Proportional to 12,390.90, 18,584.55 and 3,624.90

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Solution

The fourth proportional to 12,390.90, 18,584.55 and 3,624.90 is: 5,436.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.90 : 18,584.55 = 3,624.90 : x
  2. Step 2: Convert to fraction form
    12,390.90/18,584.55 = 3,624.90/x
  3. Step 3: Cross multiply
    12,390.90x = 18,584.55 × 3,624.90
  4. Step 4: Simplify right side
    12,390.90x = 67,367,135.30
  5. Step 5: Solve for x
    x = 67,367,135.30/12,390.90
  6. Step 6: Final answer
    x = 5,436.82

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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.