Home / 12,420.12-18,629.91-5,842.66

Finding the Fourth Proportional to 12,420.12, 18,629.91 and 5,842.66

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Solution

The fourth proportional to 12,420.12, 18,629.91 and 5,842.66 is: 8,763.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.12 : 18,629.91 = 5,842.66 : x
  2. Step 2: Convert to fraction form
    12,420.12/18,629.91 = 5,842.66/x
  3. Step 3: Cross multiply
    12,420.12x = 18,629.91 × 5,842.66
  4. Step 4: Simplify right side
    12,420.12x = 108,848,229.96
  5. Step 5: Solve for x
    x = 108,848,229.96/12,420.12
  6. Step 6: Final answer
    x = 8,763.86

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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.