Home / 12,189.58-18,285.88-4,290.24

Finding the Fourth Proportional to 12,189.58, 18,285.88 and 4,290.24

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Solution

The fourth proportional to 12,189.58, 18,285.88 and 4,290.24 is: 6,435.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,189.58 : 18,285.88 = 4,290.24 : x
  2. Step 2: Convert to fraction form
    12,189.58/18,285.88 = 4,290.24/x
  3. Step 3: Cross multiply
    12,189.58x = 18,285.88 × 4,290.24
  4. Step 4: Simplify right side
    12,189.58x = 78,450,813.81
  5. Step 5: Solve for x
    x = 78,450,813.81/12,189.58
  6. Step 6: Final answer
    x = 6,435.89

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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.