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Finding the Fourth Proportional to 28,579.99, 42,873.63 and 8,859.73

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Solution

The fourth proportional to 28,579.99, 42,873.63 and 8,859.73 is: 13,290.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,579.99 : 42,873.63 = 8,859.73 : x
  2. Step 2: Convert to fraction form
    28,579.99/42,873.63 = 8,859.73/x
  3. Step 3: Cross multiply
    28,579.99x = 42,873.63 × 8,859.73
  4. Step 4: Simplify right side
    28,579.99x = 379,848,785.92
  5. Step 5: Solve for x
    x = 379,848,785.92/28,579.99
  6. Step 6: Final answer
    x = 13,290.72

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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.