Home / 12,171.18-18,255.07-4,780.83

Finding the Fourth Proportional to 12,171.18, 18,255.07 and 4,780.83

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Solution

The fourth proportional to 12,171.18, 18,255.07 and 4,780.83 is: 7,170.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,171.18 : 18,255.07 = 4,780.83 : x
  2. Step 2: Convert to fraction form
    12,171.18/18,255.07 = 4,780.83/x
  3. Step 3: Cross multiply
    12,171.18x = 18,255.07 × 4,780.83
  4. Step 4: Simplify right side
    12,171.18x = 87,274,386.31
  5. Step 5: Solve for x
    x = 87,274,386.31/12,171.18
  6. Step 6: Final answer
    x = 7,170.58

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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.