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Finding the Fourth Proportional to 11,912.63, 17,868.94 and 4,987.13

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Solution

The fourth proportional to 11,912.63, 17,868.94 and 4,987.13 is: 7,480.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,912.63 : 17,868.94 = 4,987.13 : x
  2. Step 2: Convert to fraction form
    11,912.63/17,868.94 = 4,987.13/x
  3. Step 3: Cross multiply
    11,912.63x = 17,868.94 × 4,987.13
  4. Step 4: Simplify right side
    11,912.63x = 89,114,624.93
  5. Step 5: Solve for x
    x = 89,114,624.93/11,912.63
  6. Step 6: Final answer
    x = 7,480.69

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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.