Home / 12,282.20-18,423.30-7,904.60

Finding the Fourth Proportional to 12,282.20, 18,423.30 and 7,904.60

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Solution

The fourth proportional to 12,282.20, 18,423.30 and 7,904.60 is: 11,856.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,282.20 : 18,423.30 = 7,904.60 : x
  2. Step 2: Convert to fraction form
    12,282.20/18,423.30 = 7,904.60/x
  3. Step 3: Cross multiply
    12,282.20x = 18,423.30 × 7,904.60
  4. Step 4: Simplify right side
    12,282.20x = 145,628,817.18
  5. Step 5: Solve for x
    x = 145,628,817.18/12,282.20
  6. Step 6: Final answer
    x = 11,856.90

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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.