Home / 12,078.07-18,117.09-4,286.89

Finding the Fourth Proportional to 12,078.07, 18,117.09 and 4,286.89

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Solution

The fourth proportional to 12,078.07, 18,117.09 and 4,286.89 is: 6,430.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.07 : 18,117.09 = 4,286.89 : x
  2. Step 2: Convert to fraction form
    12,078.07/18,117.09 = 4,286.89/x
  3. Step 3: Cross multiply
    12,078.07x = 18,117.09 × 4,286.89
  4. Step 4: Simplify right side
    12,078.07x = 77,665,971.95
  5. Step 5: Solve for x
    x = 77,665,971.95/12,078.07
  6. Step 6: Final answer
    x = 6,430.33

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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.