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Finding the Fourth Proportional to 8,779.50, 12,125.52 and 6,813.90

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Solution

The fourth proportional to 8,779.50, 12,125.52 and 6,813.90 is: 9,410.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779.50 : 12,125.52 = 6,813.90 : x
  2. Step 2: Convert to fraction form
    8,779.50/12,125.52 = 6,813.90/x
  3. Step 3: Cross multiply
    8,779.50x = 12,125.52 × 6,813.90
  4. Step 4: Simplify right side
    8,779.50x = 82,622,080.73
  5. Step 5: Solve for x
    x = 82,622,080.73/8,779.50
  6. Step 6: Final answer
    x = 9,410.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.