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Finding the Fourth Proportional to 25,969.88, 38,964.09 and 8,439.77

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Solution

The fourth proportional to 25,969.88, 38,964.09 and 8,439.77 is: 12,662.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,969.88 : 38,964.09 = 8,439.77 : x
  2. Step 2: Convert to fraction form
    25,969.88/38,964.09 = 8,439.77/x
  3. Step 3: Cross multiply
    25,969.88x = 38,964.09 × 8,439.77
  4. Step 4: Simplify right side
    25,969.88x = 328,847,957.86
  5. Step 5: Solve for x
    x = 328,847,957.86/25,969.88
  6. Step 6: Final answer
    x = 12,662.67

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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.