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Finding the Fourth Proportional to 11,812.40, 17,713.20 and 5,235.20

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Solution

The fourth proportional to 11,812.40, 17,713.20 and 5,235.20 is: 7,850.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,812.40 : 17,713.20 = 5,235.20 : x
  2. Step 2: Convert to fraction form
    11,812.40/17,713.20 = 5,235.20/x
  3. Step 3: Cross multiply
    11,812.40x = 17,713.20 × 5,235.20
  4. Step 4: Simplify right side
    11,812.40x = 92,732,144.64
  5. Step 5: Solve for x
    x = 92,732,144.64/11,812.40
  6. Step 6: Final answer
    x = 7,850.41

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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.