Home / 11,121.83-15,313.16-9,439.73

Finding the Fourth Proportional to 11,121.83, 15,313.16 and 9,439.73

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Solution

The fourth proportional to 11,121.83, 15,313.16 and 9,439.73 is: 12,997.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.83 : 15,313.16 = 9,439.73 : x
  2. Step 2: Convert to fraction form
    11,121.83/15,313.16 = 9,439.73/x
  3. Step 3: Cross multiply
    11,121.83x = 15,313.16 × 9,439.73
  4. Step 4: Simplify right side
    11,121.83x = 144,552,048.65
  5. Step 5: Solve for x
    x = 144,552,048.65/11,121.83
  6. Step 6: Final answer
    x = 12,997.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.