Home / 7,815.99-10,786.05-4,279.20

Finding the Fourth Proportional to 7,815.99, 10,786.05 and 4,279.20

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Solution

The fourth proportional to 7,815.99, 10,786.05 and 4,279.20 is: 5,905.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.99 : 10,786.05 = 4,279.20 : x
  2. Step 2: Convert to fraction form
    7,815.99/10,786.05 = 4,279.20/x
  3. Step 3: Cross multiply
    7,815.99x = 10,786.05 × 4,279.20
  4. Step 4: Simplify right side
    7,815.99x = 46,155,665.16
  5. Step 5: Solve for x
    x = 46,155,665.16/7,815.99
  6. Step 6: Final answer
    x = 5,905.29

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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.