Home / 12,291.80-18,431.33-4,391.28

Finding the Fourth Proportional to 12,291.80, 18,431.33 and 4,391.28

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Solution

The fourth proportional to 12,291.80, 18,431.33 and 4,391.28 is: 6,584.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,291.80 : 18,431.33 = 4,391.28 : x
  2. Step 2: Convert to fraction form
    12,291.80/18,431.33 = 4,391.28/x
  3. Step 3: Cross multiply
    12,291.80x = 18,431.33 × 4,391.28
  4. Step 4: Simplify right side
    12,291.80x = 80,937,108.85
  5. Step 5: Solve for x
    x = 80,937,108.85/12,291.80
  6. Step 6: Final answer
    x = 6,584.65

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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.