Home / 12,320.80-18,487.20-5,743.60

Finding the Fourth Proportional to 12,320.80, 18,487.20 and 5,743.60

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Solution

The fourth proportional to 12,320.80, 18,487.20 and 5,743.60 is: 8,618.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,320.80 : 18,487.20 = 5,743.60 : x
  2. Step 2: Convert to fraction form
    12,320.80/18,487.20 = 5,743.60/x
  3. Step 3: Cross multiply
    12,320.80x = 18,487.20 × 5,743.60
  4. Step 4: Simplify right side
    12,320.80x = 106,183,081.92
  5. Step 5: Solve for x
    x = 106,183,081.92/12,320.80
  6. Step 6: Final answer
    x = 8,618.20

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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.