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Finding the Fourth Proportional to 8,187.81, 12,281.64 and 3,503.85

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Solution

The fourth proportional to 8,187.81, 12,281.64 and 3,503.85 is: 5,255.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,187.81 : 12,281.64 = 3,503.85 : x
  2. Step 2: Convert to fraction form
    8,187.81/12,281.64 = 3,503.85/x
  3. Step 3: Cross multiply
    8,187.81x = 12,281.64 × 3,503.85
  4. Step 4: Simplify right side
    8,187.81x = 43,033,024.31
  5. Step 5: Solve for x
    x = 43,033,024.31/8,187.81
  6. Step 6: Final answer
    x = 5,255.74

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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.