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Finding the Fourth Proportional to 9,409.06, 13,043.95 and 8,909.71

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Solution

The fourth proportional to 9,409.06, 13,043.95 and 8,909.71 is: 12,351.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,409.06 : 13,043.95 = 8,909.71 : x
  2. Step 2: Convert to fraction form
    9,409.06/13,043.95 = 8,909.71/x
  3. Step 3: Cross multiply
    9,409.06x = 13,043.95 × 8,909.71
  4. Step 4: Simplify right side
    9,409.06x = 116,217,811.75
  5. Step 5: Solve for x
    x = 116,217,811.75/9,409.06
  6. Step 6: Final answer
    x = 12,351.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.