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Finding the Fourth Proportional to 12,591.55, 18,868.95 and 11,207.67

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Solution

The fourth proportional to 12,591.55, 18,868.95 and 11,207.67 is: 16,795.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.55 : 18,868.95 = 11,207.67 : x
  2. Step 2: Convert to fraction form
    12,591.55/18,868.95 = 11,207.67/x
  3. Step 3: Cross multiply
    12,591.55x = 18,868.95 × 11,207.67
  4. Step 4: Simplify right side
    12,591.55x = 211,476,964.85
  5. Step 5: Solve for x
    x = 211,476,964.85/12,591.55
  6. Step 6: Final answer
    x = 16,795.15

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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.