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Finding the Fourth Proportional to 9,084.80, 12,589.64 and 8,909.84

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Solution

The fourth proportional to 9,084.80, 12,589.64 and 8,909.84 is: 12,347.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,084.80 : 12,589.64 = 8,909.84 : x
  2. Step 2: Convert to fraction form
    9,084.80/12,589.64 = 8,909.84/x
  3. Step 3: Cross multiply
    9,084.80x = 12,589.64 × 8,909.84
  4. Step 4: Simplify right side
    9,084.80x = 112,171,678.06
  5. Step 5: Solve for x
    x = 112,171,678.06/9,084.80
  6. Step 6: Final answer
    x = 12,347.18

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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.