Home / 11,321.20-16,981.80-7,384.60

Finding the Fourth Proportional to 11,321.20, 16,981.80 and 7,384.60

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Solution

The fourth proportional to 11,321.20, 16,981.80 and 7,384.60 is: 11,076.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,321.20 : 16,981.80 = 7,384.60 : x
  2. Step 2: Convert to fraction form
    11,321.20/16,981.80 = 7,384.60/x
  3. Step 3: Cross multiply
    11,321.20x = 16,981.80 × 7,384.60
  4. Step 4: Simplify right side
    11,321.20x = 125,403,800.28
  5. Step 5: Solve for x
    x = 125,403,800.28/11,321.20
  6. Step 6: Final answer
    x = 11,076.90

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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.