Home / 12,078.62-18,120.90-9,759.66

Finding the Fourth Proportional to 12,078.62, 18,120.90 and 9,759.66

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Solution

The fourth proportional to 12,078.62, 18,120.90 and 9,759.66 is: 14,641.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.62 : 18,120.90 = 9,759.66 : x
  2. Step 2: Convert to fraction form
    12,078.62/18,120.90 = 9,759.66/x
  3. Step 3: Cross multiply
    12,078.62x = 18,120.90 × 9,759.66
  4. Step 4: Simplify right side
    12,078.62x = 176,853,822.89
  5. Step 5: Solve for x
    x = 176,853,822.89/12,078.62
  6. Step 6: Final answer
    x = 14,641.89

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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.