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Finding the Fourth Proportional to 8,518.42, 12,779.80 and 3,253.42

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Solution

The fourth proportional to 8,518.42, 12,779.80 and 3,253.42 is: 4,880.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,518.42 : 12,779.80 = 3,253.42 : x
  2. Step 2: Convert to fraction form
    8,518.42/12,779.80 = 3,253.42/x
  3. Step 3: Cross multiply
    8,518.42x = 12,779.80 × 3,253.42
  4. Step 4: Simplify right side
    8,518.42x = 41,578,056.92
  5. Step 5: Solve for x
    x = 41,578,056.92/8,518.42
  6. Step 6: Final answer
    x = 4,880.96

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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.