Home / 12,421.92-18,633.20-3,657.14

Finding the Fourth Proportional to 12,421.92, 18,633.20 and 3,657.14

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Solution

The fourth proportional to 12,421.92, 18,633.20 and 3,657.14 is: 5,485.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.92 : 18,633.20 = 3,657.14 : x
  2. Step 2: Convert to fraction form
    12,421.92/18,633.20 = 3,657.14/x
  3. Step 3: Cross multiply
    12,421.92x = 18,633.20 × 3,657.14
  4. Step 4: Simplify right side
    12,421.92x = 68,144,109.60
  5. Step 5: Solve for x
    x = 68,144,109.60/12,421.92
  6. Step 6: Final answer
    x = 5,485.80

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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.