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Finding the Fourth Proportional to 7,426.88, 11,139.28 and 1,879.88

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Solution

The fourth proportional to 7,426.88, 11,139.28 and 1,879.88 is: 2,819.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,426.88 : 11,139.28 = 1,879.88 : x
  2. Step 2: Convert to fraction form
    7,426.88/11,139.28 = 1,879.88/x
  3. Step 3: Cross multiply
    7,426.88x = 11,139.28 × 1,879.88
  4. Step 4: Simplify right side
    7,426.88x = 20,940,509.69
  5. Step 5: Solve for x
    x = 20,940,509.69/7,426.88
  6. Step 6: Final answer
    x = 2,819.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.