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Finding the Fourth Proportional to 8,511.85, 12,779.74 and 4,354.84

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Solution

The fourth proportional to 8,511.85, 12,779.74 and 4,354.84 is: 6,538.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,511.85 : 12,779.74 = 4,354.84 : x
  2. Step 2: Convert to fraction form
    8,511.85/12,779.74 = 4,354.84/x
  3. Step 3: Cross multiply
    8,511.85x = 12,779.74 × 4,354.84
  4. Step 4: Simplify right side
    8,511.85x = 55,653,744.36
  5. Step 5: Solve for x
    x = 55,653,744.36/8,511.85
  6. Step 6: Final answer
    x = 6,538.38

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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.