Home / 12,213.40-18,320.10-7,288.60

Finding the Fourth Proportional to 12,213.40, 18,320.10 and 7,288.60

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Solution

The fourth proportional to 12,213.40, 18,320.10 and 7,288.60 is: 10,932.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.40 : 18,320.10 = 7,288.60 : x
  2. Step 2: Convert to fraction form
    12,213.40/18,320.10 = 7,288.60/x
  3. Step 3: Cross multiply
    12,213.40x = 18,320.10 × 7,288.60
  4. Step 4: Simplify right side
    12,213.40x = 133,527,880.86
  5. Step 5: Solve for x
    x = 133,527,880.86/12,213.40
  6. Step 6: Final answer
    x = 10,932.90

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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.