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Finding the Fourth Proportional to 8,212.77, 12,307.82 and 7,114.41

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Solution

The fourth proportional to 8,212.77, 12,307.82 and 7,114.41 is: 10,661.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,212.77 : 12,307.82 = 7,114.41 : x
  2. Step 2: Convert to fraction form
    8,212.77/12,307.82 = 7,114.41/x
  3. Step 3: Cross multiply
    8,212.77x = 12,307.82 × 7,114.41
  4. Step 4: Simplify right side
    8,212.77x = 87,562,842.11
  5. Step 5: Solve for x
    x = 87,562,842.11/8,212.77
  6. Step 6: Final answer
    x = 10,661.79

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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.