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Finding the Fourth Proportional to 10,879.00, 15,007.95 and 6,399.90

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Solution

The fourth proportional to 10,879.00, 15,007.95 and 6,399.90 is: 8,828.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.00 : 15,007.95 = 6,399.90 : x
  2. Step 2: Convert to fraction form
    10,879.00/15,007.95 = 6,399.90/x
  3. Step 3: Cross multiply
    10,879.00x = 15,007.95 × 6,399.90
  4. Step 4: Simplify right side
    10,879.00x = 96,049,379.21
  5. Step 5: Solve for x
    x = 96,049,379.21/10,879.00
  6. Step 6: Final answer
    x = 8,828.88

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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.