Home / 11,901.65-16,412.94-7,120.82

Finding the Fourth Proportional to 11,901.65, 16,412.94 and 7,120.82

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Solution

The fourth proportional to 11,901.65, 16,412.94 and 7,120.82 is: 9,819.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,901.65 : 16,412.94 = 7,120.82 : x
  2. Step 2: Convert to fraction form
    11,901.65/16,412.94 = 7,120.82/x
  3. Step 3: Cross multiply
    11,901.65x = 16,412.94 × 7,120.82
  4. Step 4: Simplify right side
    11,901.65x = 116,873,632.44
  5. Step 5: Solve for x
    x = 116,873,632.44/11,901.65
  6. Step 6: Final answer
    x = 9,819.96

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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.