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Finding the Fourth Proportional to 12,624.80, 18,937.20 and 11,239.70

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Solution

The fourth proportional to 12,624.80, 18,937.20 and 11,239.70 is: 16,859.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,624.80 : 18,937.20 = 11,239.70 : x
  2. Step 2: Convert to fraction form
    12,624.80/18,937.20 = 11,239.70/x
  3. Step 3: Cross multiply
    12,624.80x = 18,937.20 × 11,239.70
  4. Step 4: Simplify right side
    12,624.80x = 212,848,446.84
  5. Step 5: Solve for x
    x = 212,848,446.84/12,624.80
  6. Step 6: Final answer
    x = 16,859.55

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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.