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Finding the Fourth Proportional to 10,779.80, 16,169.70 and 8,576.60

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Solution

The fourth proportional to 10,779.80, 16,169.70 and 8,576.60 is: 12,864.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,779.80 : 16,169.70 = 8,576.60 : x
  2. Step 2: Convert to fraction form
    10,779.80/16,169.70 = 8,576.60/x
  3. Step 3: Cross multiply
    10,779.80x = 16,169.70 × 8,576.60
  4. Step 4: Simplify right side
    10,779.80x = 138,681,049.02
  5. Step 5: Solve for x
    x = 138,681,049.02/10,779.80
  6. Step 6: Final answer
    x = 12,864.90

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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.