Home / 7,815.91-10,786.23-4,279.45

Finding the Fourth Proportional to 7,815.91, 10,786.23 and 4,279.45

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Solution

The fourth proportional to 7,815.91, 10,786.23 and 4,279.45 is: 5,905.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.91 : 10,786.23 = 4,279.45 : x
  2. Step 2: Convert to fraction form
    7,815.91/10,786.23 = 4,279.45/x
  3. Step 3: Cross multiply
    7,815.91x = 10,786.23 × 4,279.45
  4. Step 4: Simplify right side
    7,815.91x = 46,159,131.97
  5. Step 5: Solve for x
    x = 46,159,131.97/7,815.91
  6. Step 6: Final answer
    x = 5,905.79

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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.